<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.dropbox.com/role/AccruedAndOtherCurrentLiabilities" xlink:href="dbx-20181231.xsd#AccruedAndOtherCurrentLiabilities" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/AccruedAndOtherCurrentLiabilitiesDetails" xlink:href="dbx-20181231.xsd#AccruedAndOtherCurrentLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/AccruedAndOtherCurrentLiabilitiesTables" xlink:href="dbx-20181231.xsd#AccruedAndOtherCurrentLiabilitiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/BusinessCombinations" xlink:href="dbx-20181231.xsd#BusinessCombinations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/CashCashEquivalentsAndShortTermInvestments" xlink:href="dbx-20181231.xsd#CashCashEquivalentsAndShortTermInvestments" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/CashCashEquivalentsAndShortTermInvestmentsContractualMaturitiesOfShortTermInvestmentsDetails" xlink:href="dbx-20181231.xsd#CashCashEquivalentsAndShortTermInvestmentsContractualMaturitiesOfShortTermInvestmentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/CashCashEquivalentsAndShortTermInvestmentsNarrativeDetails" xlink:href="dbx-20181231.xsd#CashCashEquivalentsAndShortTermInvestmentsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/CashCashEquivalentsAndShortTermInvestmentsScheduleOfCashCashEquivalentsAndShortTermInvestmentsDetails" xlink:href="dbx-20181231.xsd#CashCashEquivalentsAndShortTermInvestmentsScheduleOfCashCashEquivalentsAndShortTermInvestmentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/CashCashEquivalentsAndShortTermInvestmentsScheduleOfCashCashEquivalentsAndShortTermInvestmentsDetailsCalc2" xlink:href="dbx-20181231.xsd#CashCashEquivalentsAndShortTermInvestmentsScheduleOfCashCashEquivalentsAndShortTermInvestmentsDetailsCalc2" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/CashCashEquivalentsAndShortTermInvestmentsShortTermInvestmentsInUnrealizedLossPositionsDetails" xlink:href="dbx-20181231.xsd#CashCashEquivalentsAndShortTermInvestmentsShortTermInvestmentsInUnrealizedLossPositionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/CashCashEquivalentsAndShortTermInvestmentsTables" xlink:href="dbx-20181231.xsd#CashCashEquivalentsAndShortTermInvestmentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/CommitmentsAndContingencies" xlink:href="dbx-20181231.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/CommitmentsAndContingenciesNarrativeDetails" xlink:href="dbx-20181231.xsd#CommitmentsAndContingenciesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/CommitmentsAndContingenciesScheduleOfFutureMinimumPaymentsDetails" xlink:href="dbx-20181231.xsd#CommitmentsAndContingenciesScheduleOfFutureMinimumPaymentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/CommitmentsAndContingenciesTables" xlink:href="dbx-20181231.xsd#CommitmentsAndContingenciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/ConsolidatedBalanceSheets" xlink:href="dbx-20181231.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="dbx-20181231.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="dbx-20181231.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/ConsolidatedStatementsOfComprehensiveLoss" xlink:href="dbx-20181231.xsd#ConsolidatedStatementsOfComprehensiveLoss" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/ConsolidatedStatementsOfOperations" xlink:href="dbx-20181231.xsd#ConsolidatedStatementsOfOperations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/ConsolidatedStatementsOfOperationsParenthetical" xlink:href="dbx-20181231.xsd#ConsolidatedStatementsOfOperationsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:href="dbx-20181231.xsd#ConsolidatedStatementsOfStockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPolicies" xlink:href="dbx-20181231.xsd#DescriptionOfBusinessAndSummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesAdvertisingAndPromotionalExpenseDetails" xlink:href="dbx-20181231.xsd#DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesAdvertisingAndPromotionalExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesConcentrationsOfCreditRiskDetails" xlink:href="dbx-20181231.xsd#DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesConcentrationsOfCreditRiskDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesDeferredCommissionsNetDetails" xlink:href="dbx-20181231.xsd#DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesDeferredCommissionsNetDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesDeferredOfferingCostsDetails" xlink:href="dbx-20181231.xsd#DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesDeferredOfferingCostsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesForeignCurrencyTransactionsDetails" xlink:href="dbx-20181231.xsd#DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesForeignCurrencyTransactionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesInitialPublicOfferingAndPrivatePlacementDetails" xlink:href="dbx-20181231.xsd#DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesInitialPublicOfferingAndPrivatePlacementDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesInternalUseSoftwareDetails" xlink:href="dbx-20181231.xsd#DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesInternalUseSoftwareDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesLeaseObligationsDetails" xlink:href="dbx-20181231.xsd#DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesLeaseObligationsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesNonTradeReceivablesDetails" xlink:href="dbx-20181231.xsd#DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesNonTradeReceivablesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:href="dbx-20181231.xsd#DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipmentNetDetails" xlink:href="dbx-20181231.xsd#DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipmentNetDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesRevenueRecognitionDetails" xlink:href="dbx-20181231.xsd#DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesRevenueRecognitionDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesStockBasedCompensationDetails" xlink:href="dbx-20181231.xsd#DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesStockBasedCompensationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesTables" xlink:href="dbx-20181231.xsd#DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesTradeAndOtherReceivablesNetDetails" xlink:href="dbx-20181231.xsd#DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesTradeAndOtherReceivablesNetDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/DocumentAndEntityInformation" xlink:href="dbx-20181231.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/FairValueMeasurements" xlink:href="dbx-20181231.xsd#FairValueMeasurements" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/FairValueMeasurementsDetails" xlink:href="dbx-20181231.xsd#FairValueMeasurementsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/FairValueMeasurementsTables" xlink:href="dbx-20181231.xsd#FairValueMeasurementsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/GeographicAreas" xlink:href="dbx-20181231.xsd#GeographicAreas" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/GeographicAreasDetails" xlink:href="dbx-20181231.xsd#GeographicAreasDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/GeographicAreasTables" xlink:href="dbx-20181231.xsd#GeographicAreasTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/Goodwill" xlink:href="dbx-20181231.xsd#Goodwill" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/GoodwillDetails" xlink:href="dbx-20181231.xsd#GoodwillDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/GoodwillTables" xlink:href="dbx-20181231.xsd#GoodwillTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/IncomeTaxes" xlink:href="dbx-20181231.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/IncomeTaxesComponentsOfDeferredTaxAssetsAndDeferredTaxLiabilitiesDetails" xlink:href="dbx-20181231.xsd#IncomeTaxesComponentsOfDeferredTaxAssetsAndDeferredTaxLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/IncomeTaxesComponentsOfIncomeTaxExpenseBenefitDetails" xlink:href="dbx-20181231.xsd#IncomeTaxesComponentsOfIncomeTaxExpenseBenefitDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/IncomeTaxesIncomeTaxRateReconciliationDetails" xlink:href="dbx-20181231.xsd#IncomeTaxesIncomeTaxRateReconciliationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/IncomeTaxesNarrativeDetails" xlink:href="dbx-20181231.xsd#IncomeTaxesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/IncomeTaxesReconciliationOfUnrecognizedTaxBenefitsDetails" xlink:href="dbx-20181231.xsd#IncomeTaxesReconciliationOfUnrecognizedTaxBenefitsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/IncomeTaxesScheduleOfLossFromContinuingOperationsBeforeIncomeTaxesDetails" xlink:href="dbx-20181231.xsd#IncomeTaxesScheduleOfLossFromContinuingOperationsBeforeIncomeTaxesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/IncomeTaxesTables" xlink:href="dbx-20181231.xsd#IncomeTaxesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/IntangibleAssetsNet" xlink:href="dbx-20181231.xsd#IntangibleAssetsNet" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/IntangibleAssetsNetScheduleOfFutureAmortizationExpenseDetails" xlink:href="dbx-20181231.xsd#IntangibleAssetsNetScheduleOfFutureAmortizationExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/IntangibleAssetsNetScheduleOfIntangibleAssetsDetails" xlink:href="dbx-20181231.xsd#IntangibleAssetsNetScheduleOfIntangibleAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/IntangibleAssetsNetTables" xlink:href="dbx-20181231.xsd#IntangibleAssetsNetTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/NetLossPerShare" xlink:href="dbx-20181231.xsd#NetLossPerShare" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/NetLossPerShareScheduleOfEarningsPerShareBasicAndDilutedDetails" xlink:href="dbx-20181231.xsd#NetLossPerShareScheduleOfEarningsPerShareBasicAndDilutedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/NetLossPerShareScheduleOfPotentiallyDilutiveSecuritiesExcludedFromComputationOfEarningsPerShareDetails" xlink:href="dbx-20181231.xsd#NetLossPerShareScheduleOfPotentiallyDilutiveSecuritiesExcludedFromComputationOfEarningsPerShareDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/NetLossPerShareTables" xlink:href="dbx-20181231.xsd#NetLossPerShareTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/PropertyAndEquipmentNet" xlink:href="dbx-20181231.xsd#PropertyAndEquipmentNet" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/PropertyAndEquipmentNetNarrativeDetails" xlink:href="dbx-20181231.xsd#PropertyAndEquipmentNetNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/PropertyAndEquipmentNetScheduleOfPropertyAndEquipmentNetDetails" xlink:href="dbx-20181231.xsd#PropertyAndEquipmentNetScheduleOfPropertyAndEquipmentNetDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/PropertyAndEquipmentNetTables" xlink:href="dbx-20181231.xsd#PropertyAndEquipmentNetTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/RelatedPartyTransactions" xlink:href="dbx-20181231.xsd#RelatedPartyTransactions" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/RelatedPartyTransactionsDetails" xlink:href="dbx-20181231.xsd#RelatedPartyTransactionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/RevolvingCreditFacility" xlink:href="dbx-20181231.xsd#RevolvingCreditFacility" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/RevolvingCreditFacilityDetails" xlink:href="dbx-20181231.xsd#RevolvingCreditFacilityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/StockholdersEquity" xlink:href="dbx-20181231.xsd#StockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/StockholdersEquityAwardModificationsDetails" xlink:href="dbx-20181231.xsd#StockholdersEquityAwardModificationsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/StockholdersEquityCoFounderGrantsDetails" xlink:href="dbx-20181231.xsd#StockholdersEquityCoFounderGrantsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/StockholdersEquityCommonStockDetails" xlink:href="dbx-20181231.xsd#StockholdersEquityCommonStockDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/StockholdersEquityConvertiblePreferredStockAndPreferredStockDetails" xlink:href="dbx-20181231.xsd#StockholdersEquityConvertiblePreferredStockAndPreferredStockDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/StockholdersEquityEquityIncentivePlansDetails" xlink:href="dbx-20181231.xsd#StockholdersEquityEquityIncentivePlansDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/StockholdersEquityScheduleOfPreTaxIntrinsicValueDetails" xlink:href="dbx-20181231.xsd#StockholdersEquityScheduleOfPreTaxIntrinsicValueDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/StockholdersEquityScheduleOfStockOptionAndRestrictedStockActivityDetails" xlink:href="dbx-20181231.xsd#StockholdersEquityScheduleOfStockOptionAndRestrictedStockActivityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/StockholdersEquityTables" xlink:href="dbx-20181231.xsd#StockholdersEquityTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/SubsequentEvents" xlink:href="dbx-20181231.xsd#SubsequentEvents" xlink:type="simple" />
  <link:roleRef roleURI="http://www.dropbox.com/role/SubsequentEventsDetails" xlink:href="dbx-20181231.xsd#SubsequentEventsDetails" xlink:type="simple" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/AccruedAndOtherCurrentLiabilities" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/AccruedAndOtherCurrentLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:href="dbx-20181231.xsd#dbx_AccruedLiabilitiesandOtherLiabilitiesCurrent" xlink:label="loc_dbx_AccruedLiabilitiesandOtherLiabilitiesCurrent_9c329b6b-c382-d864-a70f-bd17951f286f" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedProfessionalFeesCurrent" xlink:label="loc_us-gaap_AccruedProfessionalFeesCurrent_113b0150-367f-99b9-4773-3f3df4696704" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dbx_AccruedLiabilitiesandOtherLiabilitiesCurrent_9c329b6b-c382-d864-a70f-bd17951f286f" xlink:to="loc_us-gaap_AccruedProfessionalFeesCurrent_113b0150-367f-99b9-4773-3f3df4696704" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedRentCurrent" xlink:label="loc_us-gaap_AccruedRentCurrent_8a12cebf-c38b-2041-9e9e-0bdc79a2b3c1" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dbx_AccruedLiabilitiesandOtherLiabilitiesCurrent_9c329b6b-c382-d864-a70f-bd17951f286f" xlink:to="loc_us-gaap_AccruedRentCurrent_8a12cebf-c38b-2041-9e9e-0bdc79a2b3c1" xlink:type="arc" />
    <link:loc xlink:href="dbx-20181231.xsd#dbx_FinancingObligationsCurrent" xlink:label="loc_dbx_FinancingObligationsCurrent_6bffc983-3385-ad6e-4927-bd17950c33a4" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dbx_AccruedLiabilitiesandOtherLiabilitiesCurrent_9c329b6b-c382-d864-a70f-bd17951f286f" xlink:to="loc_dbx_FinancingObligationsCurrent_6bffc983-3385-ad6e-4927-bd17950c33a4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedIncomeTaxesCurrent" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_d1997c77-9fc6-cbee-b2e4-9f642058c98e" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dbx_AccruedLiabilitiesandOtherLiabilitiesCurrent_9c329b6b-c382-d864-a70f-bd17951f286f" xlink:to="loc_us-gaap_AccruedIncomeTaxesCurrent_d1997c77-9fc6-cbee-b2e4-9f642058c98e" xlink:type="arc" />
    <link:loc xlink:href="dbx-20181231.xsd#dbx_OtherAccruedLiabilitiesAndOtherLiabilitiesCurrent" xlink:label="loc_dbx_OtherAccruedLiabilitiesAndOtherLiabilitiesCurrent_cc3708fd-aa79-108d-4732-bd17950300b5" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dbx_AccruedLiabilitiesandOtherLiabilitiesCurrent_9c329b6b-c382-d864-a70f-bd17951f286f" xlink:to="loc_dbx_OtherAccruedLiabilitiesAndOtherLiabilitiesCurrent_cc3708fd-aa79-108d-4732-bd17950300b5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent" xlink:label="loc_us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent_d31892de-11c1-2896-c1b4-6e61bb9452f8" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dbx_AccruedLiabilitiesandOtherLiabilitiesCurrent_9c329b6b-c382-d864-a70f-bd17951f286f" xlink:to="loc_us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent_d31892de-11c1-2896-c1b4-6e61bb9452f8" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/AccruedAndOtherCurrentLiabilitiesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/BusinessCombinations" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/CashCashEquivalentsAndShortTermInvestments" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/CashCashEquivalentsAndShortTermInvestmentsContractualMaturitiesOfShortTermInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_f6ff2172-3458-48e3-910c-15bc69a86f4f" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_a97722c4-c88e-0258-6d8c-8f5c45929660" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_f6ff2172-3458-48e3-910c-15bc69a86f4f" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_a97722c4-c88e-0258-6d8c-8f5c45929660" xlink:type="arc" />
    <link:loc xlink:href="dbx-20181231.xsd#dbx_DebtSecuritiesAvailableForSaleSecuritiesMaturityAllocatedAndSingleMaturityDateAfterOneThroughFourYearsAmortizedCost" xlink:label="loc_dbx_DebtSecuritiesAvailableForSaleSecuritiesMaturityAllocatedAndSingleMaturityDateAfterOneThroughFourYearsAmortizedCost_a7616893-faa1-0830-9490-bd1794990bd7" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_f6ff2172-3458-48e3-910c-15bc69a86f4f" xlink:to="loc_dbx_DebtSecuritiesAvailableForSaleSecuritiesMaturityAllocatedAndSingleMaturityDateAfterOneThroughFourYearsAmortizedCost_a7616893-faa1-0830-9490-bd1794990bd7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_429864ac-8a23-0bcf-083f-252bc1c0b989" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_329a232f-6b5a-4dfb-de74-33d6f53aa8f1" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_429864ac-8a23-0bcf-083f-252bc1c0b989" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_329a232f-6b5a-4dfb-de74-33d6f53aa8f1" xlink:type="arc" />
    <link:loc xlink:href="dbx-20181231.xsd#dbx_DebtSecuritiesAvailableForSaleSecuritiesMaturityAllocatedAndSingleMaturityDateAfterOneThroughFourYearsFairValue" xlink:label="loc_dbx_DebtSecuritiesAvailableForSaleSecuritiesMaturityAllocatedAndSingleMaturityDateAfterOneThroughFourYearsFairValue_00da211a-50b1-d3ad-0ed5-bd1794f1be92" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_429864ac-8a23-0bcf-083f-252bc1c0b989" xlink:to="loc_dbx_DebtSecuritiesAvailableForSaleSecuritiesMaturityAllocatedAndSingleMaturityDateAfterOneThroughFourYearsFairValue_00da211a-50b1-d3ad-0ed5-bd1794f1be92" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/CashCashEquivalentsAndShortTermInvestmentsNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/CashCashEquivalentsAndShortTermInvestmentsScheduleOfCashCashEquivalentsAndShortTermInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_32f41ea9-05c6-e713-464b-586a571d1c1f" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_67a1f3e7-c91e-d9a1-0253-362c8d727f2d" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_32f41ea9-05c6-e713-464b-586a571d1c1f" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_67a1f3e7-c91e-d9a1-0253-362c8d727f2d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_f0bf2241-14f8-6ef1-e8d7-f724d52ad9c1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_5d23fa7e-7f76-6507-b72f-382f81b88e34" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_f0bf2241-14f8-6ef1-e8d7-f724d52ad9c1" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_5d23fa7e-7f76-6507-b72f-382f81b88e34" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_e0f935d0-20e2-15fc-55a1-79c116fbc07c" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_f0bf2241-14f8-6ef1-e8d7-f724d52ad9c1" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_e0f935d0-20e2-15fc-55a1-79c116fbc07c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_5ab305fa-195a-59cf-c0de-4b5d05fc9de4" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_f0bf2241-14f8-6ef1-e8d7-f724d52ad9c1" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_5ab305fa-195a-59cf-c0de-4b5d05fc9de4" xlink:type="arc" />
    <link:loc xlink:href="dbx-20181231.xsd#dbx_CashCashEquivalentsAndShortTermInvestmentsAmortizedCost" xlink:label="loc_dbx_CashCashEquivalentsAndShortTermInvestmentsAmortizedCost_e3c8a817-d861-f8cf-dc40-bd1794d907f0" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dbx_CashCashEquivalentsAndShortTermInvestmentsAmortizedCost_e3c8a817-d861-f8cf-dc40-bd1794d907f0" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_5d23fa7e-7f76-6507-b72f-382f81b88e34" xlink:type="arc" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dbx_CashCashEquivalentsAndShortTermInvestmentsAmortizedCost_e3c8a817-d861-f8cf-dc40-bd1794d907f0" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_e0f935d0-20e2-15fc-55a1-79c116fbc07c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCashEquivalentsAndShortTermInvestments" xlink:label="loc_us-gaap_CashCashEquivalentsAndShortTermInvestments_b06ccc35-a649-7e7d-3fa8-b8aca26e1e9a" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dbx_CashCashEquivalentsAndShortTermInvestmentsAmortizedCost_e3c8a817-d861-f8cf-dc40-bd1794d907f0" xlink:to="loc_us-gaap_CashCashEquivalentsAndShortTermInvestments_b06ccc35-a649-7e7d-3fa8-b8aca26e1e9a" xlink:type="arc" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsAndShortTermInvestments_b06ccc35-a649-7e7d-3fa8-b8aca26e1e9a" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_67a1f3e7-c91e-d9a1-0253-362c8d727f2d" xlink:type="arc" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsAndShortTermInvestments_b06ccc35-a649-7e7d-3fa8-b8aca26e1e9a" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_5ab305fa-195a-59cf-c0de-4b5d05fc9de4" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/CashCashEquivalentsAndShortTermInvestmentsScheduleOfCashCashEquivalentsAndShortTermInvestmentsDetailsCalc2" xlink:type="extended">
    <link:loc xlink:href="dbx-20181231.xsd#dbx_CashCashEquivalentsAndShortTermInvestmentsAmortizedCost" xlink:label="loc_dbx_CashCashEquivalentsAndShortTermInvestmentsAmortizedCost_43C21C9142F9A9E1076407B8CFF7E902_e3c8a817-d861-f8cf-dc40-bd1794d907f0" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_43C21C9142F9A9E1076407B8CFF7E902_f0bf2241-14f8-6ef1-e8d7-f724d52ad9c1" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dbx_CashCashEquivalentsAndShortTermInvestmentsAmortizedCost_43C21C9142F9A9E1076407B8CFF7E902_e3c8a817-d861-f8cf-dc40-bd1794d907f0" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_43C21C9142F9A9E1076407B8CFF7E902_f0bf2241-14f8-6ef1-e8d7-f724d52ad9c1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_43C21C9142F9A9E1076407B8CFF7E902_32f41ea9-05c6-e713-464b-586a571d1c1f" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dbx_CashCashEquivalentsAndShortTermInvestmentsAmortizedCost_43C21C9142F9A9E1076407B8CFF7E902_e3c8a817-d861-f8cf-dc40-bd1794d907f0" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_43C21C9142F9A9E1076407B8CFF7E902_32f41ea9-05c6-e713-464b-586a571d1c1f" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/CashCashEquivalentsAndShortTermInvestmentsShortTermInvestmentsInUnrealizedLossPositionsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_5ad2bd9a-8a3d-b589-f487-66423fdb193d" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_db9e5922-2e70-406b-1ac3-0318ebdc102f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_5ad2bd9a-8a3d-b589-f487-66423fdb193d" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_db9e5922-2e70-406b-1ac3-0318ebdc102f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_97b62833-0a42-058f-3886-4b4d65c49079" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_5ad2bd9a-8a3d-b589-f487-66423fdb193d" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_97b62833-0a42-058f-3886-4b4d65c49079" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_5fba5b8c-f33f-c8fe-316d-96157b5eaddf" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_540feb58-a104-9e2c-e527-965521238e74" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_5fba5b8c-f33f-c8fe-316d-96157b5eaddf" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_540feb58-a104-9e2c-e527-965521238e74" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_9dc7d38b-d1f1-ee4c-83ca-bf0de39ac02c" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_5fba5b8c-f33f-c8fe-316d-96157b5eaddf" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_9dc7d38b-d1f1-ee4c-83ca-bf0de39ac02c" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/CashCashEquivalentsAndShortTermInvestmentsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/CommitmentsAndContingencies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/CommitmentsAndContingenciesNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/CommitmentsAndContingenciesScheduleOfFutureMinimumPaymentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitment" xlink:label="loc_us-gaap_OtherCommitment_01617088-e15d-df87-fac1-8159c99c8265" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitmentDueInNextTwelveMonths" xlink:label="loc_us-gaap_OtherCommitmentDueInNextTwelveMonths_0962ec60-8ab6-1cb8-9bed-ee92dfb6b849" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_01617088-e15d-df87-fac1-8159c99c8265" xlink:to="loc_us-gaap_OtherCommitmentDueInNextTwelveMonths_0962ec60-8ab6-1cb8-9bed-ee92dfb6b849" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitmentDueInSecondYear" xlink:label="loc_us-gaap_OtherCommitmentDueInSecondYear_0a55f62b-dd36-df29-dde0-6b43aadaa50d" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_01617088-e15d-df87-fac1-8159c99c8265" xlink:to="loc_us-gaap_OtherCommitmentDueInSecondYear_0a55f62b-dd36-df29-dde0-6b43aadaa50d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitmentDueInThirdYear" xlink:label="loc_us-gaap_OtherCommitmentDueInThirdYear_1e3f4530-c8c6-e204-389d-78ee78e5bc31" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_01617088-e15d-df87-fac1-8159c99c8265" xlink:to="loc_us-gaap_OtherCommitmentDueInThirdYear_1e3f4530-c8c6-e204-389d-78ee78e5bc31" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitmentDueInFourthYear" xlink:label="loc_us-gaap_OtherCommitmentDueInFourthYear_348c6de2-f0e3-1a42-8cc3-6adc90f4f37d" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_01617088-e15d-df87-fac1-8159c99c8265" xlink:to="loc_us-gaap_OtherCommitmentDueInFourthYear_348c6de2-f0e3-1a42-8cc3-6adc90f4f37d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitmentDueInFifthYear" xlink:label="loc_us-gaap_OtherCommitmentDueInFifthYear_301aa4c9-532b-55d6-4b33-5a20e9265539" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_01617088-e15d-df87-fac1-8159c99c8265" xlink:to="loc_us-gaap_OtherCommitmentDueInFifthYear_301aa4c9-532b-55d6-4b33-5a20e9265539" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherCommitmentDueAfterFifthYear" xlink:label="loc_us-gaap_OtherCommitmentDueAfterFifthYear_9134f0f8-db71-fdd7-2915-2155d1a159af" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherCommitment_01617088-e15d-df87-fac1-8159c99c8265" xlink:to="loc_us-gaap_OtherCommitmentDueAfterFifthYear_9134f0f8-db71-fdd7-2915-2155d1a159af" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_3fe38eda-4456-a563-4395-a5a37d278f3f" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_9ab26f2b-d83e-1c3d-e690-2dde044c94a1" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_3fe38eda-4456-a563-4395-a5a37d278f3f" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_9ab26f2b-d83e-1c3d-e690-2dde044c94a1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_fd7e67d9-87c3-7778-6bc0-5545f2d4ac3e" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_3fe38eda-4456-a563-4395-a5a37d278f3f" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_fd7e67d9-87c3-7778-6bc0-5545f2d4ac3e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_a8e23163-8414-ea7e-80b9-68a6b093b7ba" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_3fe38eda-4456-a563-4395-a5a37d278f3f" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_a8e23163-8414-ea7e-80b9-68a6b093b7ba" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_9c06b161-1916-c449-ccf9-dc1e39d72edf" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_3fe38eda-4456-a563-4395-a5a37d278f3f" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_9c06b161-1916-c449-ccf9-dc1e39d72edf" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_1c0af884-3189-dce4-5783-6a4f6cbd4182" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_3fe38eda-4456-a563-4395-a5a37d278f3f" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_1c0af884-3189-dce4-5783-6a4f6cbd4182" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_fab6c2dc-4703-7e05-c969-94eac4760773" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_3fe38eda-4456-a563-4395-a5a37d278f3f" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_fab6c2dc-4703-7e05-c969-94eac4760773" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_30d028f9-2f3a-4a0c-02f8-ea9552d875b6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_ccaff3fc-3d87-e58a-0083-69dda0c10f9d" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_30d028f9-2f3a-4a0c-02f8-ea9552d875b6" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_ccaff3fc-3d87-e58a-0083-69dda0c10f9d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_39e76369-4fdc-9d5f-860a-45d0795e5fb0" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_30d028f9-2f3a-4a0c-02f8-ea9552d875b6" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_39e76369-4fdc-9d5f-860a-45d0795e5fb0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_fe404cae-7fcc-3489-844f-4d90e9776180" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_30d028f9-2f3a-4a0c-02f8-ea9552d875b6" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_fe404cae-7fcc-3489-844f-4d90e9776180" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_5b651b24-1278-4eab-c840-7002c6d68546" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_30d028f9-2f3a-4a0c-02f8-ea9552d875b6" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_5b651b24-1278-4eab-c840-7002c6d68546" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_36c616b1-40de-90d4-3c05-7e224ce1169a" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_30d028f9-2f3a-4a0c-02f8-ea9552d875b6" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_36c616b1-40de-90d4-3c05-7e224ce1169a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_f67237f3-7c78-8a5c-b7b3-17f1eb0b017a" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_30d028f9-2f3a-4a0c-02f8-ea9552d875b6" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_f67237f3-7c78-8a5c-b7b3-17f1eb0b017a" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/CommitmentsAndContingenciesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:to="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_928a1618-af56-709a-989c-a303706b8ca2" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_928a1618-af56-709a-989c-a303706b8ca2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_32f41ea9-05c6-e713-464b-586a571d1c1f" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_32f41ea9-05c6-e713-464b-586a571d1c1f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_ce9014ac-0ac4-6ed2-b53f-a0edc046d6b4" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_ce9014ac-0ac4-6ed2-b53f-a0edc046d6b4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_d32a2417-a96e-df92-8909-70df29d31528" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_d79dcc1c-93de-0ecd-2bd5-7c1f224c9b98" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_d32a2417-a96e-df92-8909-70df29d31528" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_f37ad080-c77a-efc5-c936-389b16abc420" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_f37ad080-c77a-efc5-c936-389b16abc420" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_af012273-e8ee-655c-daa2-86b96989d377" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_af012273-e8ee-655c-daa2-86b96989d377" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_831ad0b9-9dba-3997-20e6-e99a19aa28db" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:to="loc_us-gaap_Goodwill_831ad0b9-9dba-3997-20e6-e99a19aa28db" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_ddb0d184-2205-2a10-5b0e-faf2ccd717ae" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_96dd7052-744e-d270-4e77-67944ec39152" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_ddb0d184-2205-2a10-5b0e-faf2ccd717ae" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_63817d40-f759-fa9c-45a5-8bbbb36ed5c9" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_6765f135-8c69-bebc-a116-d59a52a5b2f2" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_63817d40-f759-fa9c-45a5-8bbbb36ed5c9" xlink:to="loc_us-gaap_StockholdersEquity_6765f135-8c69-bebc-a116-d59a52a5b2f2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_aefe3f0c-abe4-5b83-9a64-da77d8e253dd" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_6765f135-8c69-bebc-a116-d59a52a5b2f2" xlink:to="loc_us-gaap_CommonStockValue_aefe3f0c-abe4-5b83-9a64-da77d8e253dd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaap_AdditionalPaidInCapital_6dca832a-861c-478d-b1a0-396533beb40d" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_6765f135-8c69-bebc-a116-d59a52a5b2f2" xlink:to="loc_us-gaap_AdditionalPaidInCapital_6dca832a-861c-478d-b1a0-396533beb40d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_a59bc5ae-63a0-c9bc-32f7-e2bd9f32bd26" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_6765f135-8c69-bebc-a116-d59a52a5b2f2" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_a59bc5ae-63a0-c9bc-32f7-e2bd9f32bd26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_798442bf-12e1-d944-3fa1-8b797b67482e" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_6765f135-8c69-bebc-a116-d59a52a5b2f2" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_798442bf-12e1-d944-3fa1-8b797b67482e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_ea289a9d-deba-2cde-21e4-3d0ae7a1f011" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_6765f135-8c69-bebc-a116-d59a52a5b2f2" xlink:to="loc_us-gaap_PreferredStockValue_ea289a9d-deba-2cde-21e4-3d0ae7a1f011" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_63817d40-f759-fa9c-45a5-8bbbb36ed5c9" xlink:to="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:to="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_c2c48170-d0ff-2c37-effc-ff5f53e30dcb" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:to="loc_us-gaap_AccountsPayableCurrent_c2c48170-d0ff-2c37-effc-ff5f53e30dcb" xlink:type="arc" />
    <link:loc xlink:href="dbx-20181231.xsd#dbx_AccruedLiabilitiesandOtherLiabilitiesCurrent" xlink:label="loc_dbx_AccruedLiabilitiesandOtherLiabilitiesCurrent_9c329b6b-c382-d864-a70f-bd17951f286f" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:to="loc_dbx_AccruedLiabilitiesandOtherLiabilitiesCurrent_9c329b6b-c382-d864-a70f-bd17951f286f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_b0e2721e-44a1-957d-5aaa-294b580a15e3" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_b0e2721e-44a1-957d-5aaa-294b580a15e3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeaseObligationsCurrent" xlink:label="loc_us-gaap_CapitalLeaseObligationsCurrent_5f06cb10-8b43-3baf-f240-1b99c9508c8f" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:to="loc_us-gaap_CapitalLeaseObligationsCurrent_5f06cb10-8b43-3baf-f240-1b99c9508c8f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCurrent" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_1beea529-7ff9-f264-77a3-b82530469f83" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_2dcbbde2-9146-a0ba-7f6c-c71b481e0841" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_1beea529-7ff9-f264-77a3-b82530469f83" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalLeaseObligationsNoncurrent" xlink:label="loc_us-gaap_CapitalLeaseObligationsNoncurrent_d31ac4f9-acde-4aa0-e677-cbf3bd705b92" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:to="loc_us-gaap_CapitalLeaseObligationsNoncurrent_d31ac4f9-acde-4aa0-e677-cbf3bd705b92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredRentCreditNoncurrent" xlink:label="loc_us-gaap_DeferredRentCreditNoncurrent_2c8b0baf-771b-c301-80d6-9e2df7367293" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:to="loc_us-gaap_DeferredRentCreditNoncurrent_2c8b0baf-771b-c301-80d6-9e2df7367293" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_bba08e5f-78e8-6c25-01a4-6720051135cc" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_066608da-f041-4af6-3da0-95354b640e11" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_bba08e5f-78e8-6c25-01a4-6720051135cc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_f0c68f4f-7ec1-d447-8ba7-0f2766abbe67" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_63817d40-f759-fa9c-45a5-8bbbb36ed5c9" xlink:to="loc_us-gaap_CommitmentsAndContingencies_f0c68f4f-7ec1-d447-8ba7-0f2766abbe67" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_ad8f5587-cd30-97dd-9cf0-81ed4f58516c" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_ad8f5587-cd30-97dd-9cf0-81ed4f58516c" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_a10eea14-f4db-3125-d183-77bb54500e95" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_NetIncomeLoss_a10eea14-f4db-3125-d183-77bb54500e95" xlink:type="arc" />
    <link:loc xlink:href="dbx-20181231.xsd#dbx_DeprecationDepletionAndAmortizationExcludingAmortizationOfDeferredSalesCommissions" xlink:label="loc_dbx_DeprecationDepletionAndAmortizationExcludingAmortizationOfDeferredSalesCommissions_17067d53-7708-40ce-2ce2-bd1794aaf441" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_dbx_DeprecationDepletionAndAmortizationExcludingAmortizationOfDeferredSalesCommissions_17067d53-7708-40ce-2ce2-bd1794aaf441" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_90cbc3ab-f555-6407-b3b4-b2bfa84c9f18" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_ShareBasedCompensation_90cbc3ab-f555-6407-b3b4-b2bfa84c9f18" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AmortizationOfDeferredSalesCommissions" xlink:label="loc_us-gaap_AmortizationOfDeferredSalesCommissions_55727884-b4c2-d84a-79cb-b266136a1f5c" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_AmortizationOfDeferredSalesCommissions_55727884-b4c2-d84a-79cb-b266136a1f5c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_29b0a481-c653-23c1-27cf-114dadcce1af" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_29b0a481-c653-23c1-27cf-114dadcce1af" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables_9fda936a-2bfa-73e9-848b-446869ea1c58" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables_9fda936a-2bfa-73e9-848b-446869ea1c58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_0e4168a9-901d-abb5-15c0-3622e9e2c070" xlink:type="locator" />
    <link:calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_0e4168a9-901d-abb5-15c0-3622e9e2c070" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_d54a644c-3d3c-bcc1-da30-2f136651f90f" xlink:type="locator" />
    <link:calculationArc order="8" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_d54a644c-3d3c-bcc1-da30-2f136651f90f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_0a39d2ee-656d-ead5-a676-41794b4da8f4" xlink:type="locator" />
    <link:calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_0a39d2ee-656d-ead5-a676-41794b4da8f4" xlink:type="arc" />
    <link:loc xlink:href="dbx-20181231.xsd#dbx_IncreaseDecreaseInAccruedLiabilitiesAndOtherLiabilities" xlink:label="loc_dbx_IncreaseDecreaseInAccruedLiabilitiesAndOtherLiabilities_64bb72d8-ee20-35c9-3f49-bd1794dff91e" xlink:type="locator" />
    <link:calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_dbx_IncreaseDecreaseInAccruedLiabilitiesAndOtherLiabilities_64bb72d8-ee20-35c9-3f49-bd1794dff91e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_bb8c0c41-60b6-6ad9-c835-6a671aae07c5" xlink:type="locator" />
    <link:calculationArc order="11" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_bb8c0c41-60b6-6ad9-c835-6a671aae07c5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_7d3f88de-7d0f-fe63-f176-2a8af9ecbcbd" xlink:type="locator" />
    <link:calculationArc order="12" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_7d3f88de-7d0f-fe63-f176-2a8af9ecbcbd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_4e0ea51c-d09a-0164-9f15-a1d8d4927a87" xlink:type="locator" />
    <link:calculationArc order="13" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_4e0ea51c-d09a-0164-9f15-a1d8d4927a87" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoncashContributionExpense" xlink:label="loc_us-gaap_NoncashContributionExpense_3e623fc2-434f-9b9d-c36d-f9af50abeed7" xlink:type="locator" />
    <link:calculationArc order="14" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1bd0bd4e-4a6f-b052-029c-0ecb0c520251" xlink:to="loc_us-gaap_NoncashContributionExpense_3e623fc2-434f-9b9d-c36d-f9af50abeed7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_ad8f5587-cd30-97dd-9cf0-81ed4f58516c" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_6d89f221-3ede-36b2-fcad-4a4ce1606f6a" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_6d89f221-3ede-36b2-fcad-4a4ce1606f6a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireIntangibleAssets" xlink:label="loc_us-gaap_PaymentsToAcquireIntangibleAssets_1e99261d-1af1-2d77-636d-890a4a9c4511" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:to="loc_us-gaap_PaymentsToAcquireIntangibleAssets_1e99261d-1af1-2d77-636d-890a4a9c4511" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleOfShortTermInvestments" xlink:label="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_770a1311-e7a6-f51d-9210-badc4db6ccdb" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:to="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_770a1311-e7a6-f51d-9210-badc4db6ccdb" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments_ba965a94-39bc-3f56-ea27-30816903938c" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments_ba965a94-39bc-3f56-ea27-30816903938c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_54e087e7-dea1-4188-710c-f95dcb130e6e" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_54e087e7-dea1-4188-710c-f95dcb130e6e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_5a6cca43-79c5-34f3-6172-5859b13486b1" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_28655e34-499f-b7bf-c54f-5de0990d0c65" xlink:to="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_5a6cca43-79c5-34f3-6172-5859b13486b1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_ad8f5587-cd30-97dd-9cf0-81ed4f58516c" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceInitialPublicOffering" xlink:label="loc_us-gaap_ProceedsFromIssuanceInitialPublicOffering_678cc0a1-75a1-b1b0-39a1-094379144ce2" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_ProceedsFromIssuanceInitialPublicOffering_678cc0a1-75a1-b1b0-39a1-094379144ce2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfStockIssuanceCosts" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_ea422513-12bd-029b-0166-7c34286633bc" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_ea422513-12bd-029b-0166-7c34286633bc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_43305c85-41ff-3d0f-c464-dc8983363bce" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_43305c85-41ff-3d0f-c464-dc8983363bce" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_38e7f3e2-9d1a-8772-e4aa-fb2cb7d8adc0" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_38e7f3e2-9d1a-8772-e4aa-fb2cb7d8adc0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_6ec8bc8e-bcd9-36ad-d8ae-2c2fa1dfd920" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_6ec8bc8e-bcd9-36ad-d8ae-2c2fa1dfd920" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfLongTermCapitalLeaseObligations" xlink:label="loc_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_99289045-641b-e134-789c-dbf0b6bfb577" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_99289045-641b-e134-789c-dbf0b6bfb577" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfNotesPayable" xlink:label="loc_us-gaap_RepaymentsOfNotesPayable_0875b2e3-27c1-eb02-1003-25cd8f923808" xlink:type="locator" />
    <link:calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_RepaymentsOfNotesPayable_0875b2e3-27c1-eb02-1003-25cd8f923808" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SaleLeasebackTransactionNetProceedsFinancingActivities" xlink:label="loc_us-gaap_SaleLeasebackTransactionNetProceedsFinancingActivities_c6c78152-384f-3f42-e8ed-5ba5543daa54" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_SaleLeasebackTransactionNetProceedsFinancingActivities_c6c78152-384f-3f42-e8ed-5ba5543daa54" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfFinancingCosts" xlink:label="loc_us-gaap_PaymentsOfFinancingCosts_8bd1a974-560d-3f84-e984-727058b1874b" xlink:type="locator" />
    <link:calculationArc order="9" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_d8917e24-06dd-060d-a290-e426c7895e54" xlink:to="loc_us-gaap_PaymentsOfFinancingCosts_8bd1a974-560d-3f84-e984-727058b1874b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_e0089888-8677-d95e-95e6-00fe630f2dcb" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_ad8f5587-cd30-97dd-9cf0-81ed4f58516c" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_e0089888-8677-d95e-95e6-00fe630f2dcb" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/ConsolidatedStatementsOfComprehensiveLoss" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_cf605d39-9067-2f07-a6b5-7dfa6481009e" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_59645a08-ce25-9000-2f65-e4bfddb1182e" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_cf605d39-9067-2f07-a6b5-7dfa6481009e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_59645a08-ce25-9000-2f65-e4bfddb1182e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_29b707e4-876d-47bd-8655-71c027f42964" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_59645a08-ce25-9000-2f65-e4bfddb1182e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_29b707e4-876d-47bd-8655-71c027f42964" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent_c7333cca-378d-a6fc-ae13-b512babfcdeb" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_59645a08-ce25-9000-2f65-e4bfddb1182e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent_c7333cca-378d-a6fc-ae13-b512babfcdeb" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_a10eea14-f4db-3125-d183-77bb54500e95" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_cf605d39-9067-2f07-a6b5-7dfa6481009e" xlink:to="loc_us-gaap_NetIncomeLoss_a10eea14-f4db-3125-d183-77bb54500e95" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/ConsolidatedStatementsOfOperations" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_a10eea14-f4db-3125-d183-77bb54500e95" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4d8b6d19-6a54-06aa-2077-c10380bd20d1" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_a10eea14-f4db-3125-d183-77bb54500e95" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4d8b6d19-6a54-06aa-2077-c10380bd20d1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_5c890570-5904-7978-36d8-35b96dcf45ab" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4d8b6d19-6a54-06aa-2077-c10380bd20d1" xlink:to="loc_us-gaap_OperatingIncomeLoss_5c890570-5904-7978-36d8-35b96dcf45ab" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_a2f4cf19-54a3-c9c5-9b4d-23b76125e270" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_5c890570-5904-7978-36d8-35b96dcf45ab" xlink:to="loc_us-gaap_OperatingExpenses_a2f4cf19-54a3-c9c5-9b4d-23b76125e270" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_11c9d7e5-c56e-e78a-ae7b-17989a817204" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_a2f4cf19-54a3-c9c5-9b4d-23b76125e270" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_11c9d7e5-c56e-e78a-ae7b-17989a817204" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="loc_us-gaap_SellingAndMarketingExpense_334a0036-49ae-85df-fa8d-a7de18d975ef" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_a2f4cf19-54a3-c9c5-9b4d-23b76125e270" xlink:to="loc_us-gaap_SellingAndMarketingExpense_334a0036-49ae-85df-fa8d-a7de18d975ef" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_a698662c-5d68-9b87-98fe-02485cda58f8" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_a2f4cf19-54a3-c9c5-9b4d-23b76125e270" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_a698662c-5d68-9b87-98fe-02485cda58f8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_df00e688-c7aa-f044-9cba-c48e7c14e35b" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_5c890570-5904-7978-36d8-35b96dcf45ab" xlink:to="loc_us-gaap_GrossProfit_df00e688-c7aa-f044-9cba-c48e7c14e35b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_1c604cfe-da19-5194-72b6-98be0130cfb7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_df00e688-c7aa-f044-9cba-c48e7c14e35b" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_1c604cfe-da19-5194-72b6-98be0130cfb7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_1c65a201-fd8e-32d7-dad9-c6d1d5719594" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_df00e688-c7aa-f044-9cba-c48e7c14e35b" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_1c65a201-fd8e-32d7-dad9-c6d1d5719594" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_b28ba7ff-6f6a-a222-c7cf-0da1704e7466" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4d8b6d19-6a54-06aa-2077-c10380bd20d1" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_b28ba7ff-6f6a-a222-c7cf-0da1704e7466" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_41e96f8d-e499-8de8-69a8-27f1c7d4df6e" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4d8b6d19-6a54-06aa-2077-c10380bd20d1" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_41e96f8d-e499-8de8-69a8-27f1c7d4df6e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_a10eea14-f4db-3125-d183-77bb54500e95" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/ConsolidatedStatementsOfOperationsParenthetical" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesAdvertisingAndPromotionalExpenseDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesConcentrationsOfCreditRiskDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesDeferredCommissionsNetDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesDeferredOfferingCostsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesForeignCurrencyTransactionsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesInitialPublicOfferingAndPrivatePlacementDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesInternalUseSoftwareDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesLeaseObligationsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesNonTradeReceivablesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipmentNetDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesRevenueRecognitionDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesStockBasedCompensationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DescriptionOfBusinessAndSummaryOfSignificantAccountingPoliciesTradeAndOtherReceivablesNetDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/DocumentAndEntityInformation" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/FairValueMeasurements" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/FairValueMeasurementsDetails" xlink:type="extended">
    <link:loc xlink:href="dbx-20181231.xsd#dbx_CashEquivalentsAndShorttermInvestments" xlink:label="loc_dbx_CashEquivalentsAndShorttermInvestments_828a2b56-82f5-e64f-b495-bd17949bf409" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_5ab305fa-195a-59cf-c0de-4b5d05fc9de4" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dbx_CashEquivalentsAndShorttermInvestments_828a2b56-82f5-e64f-b495-bd17949bf409" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_5ab305fa-195a-59cf-c0de-4b5d05fc9de4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_67a1f3e7-c91e-d9a1-0253-362c8d727f2d" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_dbx_CashEquivalentsAndShorttermInvestments_828a2b56-82f5-e64f-b495-bd17949bf409" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_67a1f3e7-c91e-d9a1-0253-362c8d727f2d" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/FairValueMeasurementsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/GeographicAreas" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/GeographicAreasDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/GeographicAreasTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/Goodwill" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/GoodwillDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/GoodwillTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/IncomeTaxes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/IncomeTaxesComponentsOfDeferredTaxAssetsAndDeferredTaxLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_c003e837-c7c9-cd10-ae74-916131fdc333" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_476b367a-1ad6-eb34-c01b-595b754b8aa8" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_c003e837-c7c9-cd10-ae74-916131fdc333" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_476b367a-1ad6-eb34-c01b-595b754b8aa8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_476b367a-1ad6-eb34-c01b-595b754b8aa8" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_877d9548-0a6d-f5af-1e31-5b1edfc4107e" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_877d9548-0a6d-f5af-1e31-5b1edfc4107e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_8d3f7f58-e2d6-8ff0-86f5-8d249c7b8257" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_8d3f7f58-e2d6-8ff0-86f5-8d249c7b8257" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_187bb760-9cde-c4af-d9e1-306e7a6330eb" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_187bb760-9cde-c4af-d9e1-306e7a6330eb" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals_3e8259e4-f50c-f014-e08e-1363b80d4e32" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals_3e8259e4-f50c-f014-e08e-1363b80d4e32" xlink:type="arc" />
    <link:loc xlink:href="dbx-20181231.xsd#dbx_DeferredTaxAssetsFixedAndIntangibleAssets" xlink:label="loc_dbx_DeferredTaxAssetsFixedAndIntangibleAssets_FB8672EF028F572DF67DD352C3ACACC9" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:to="loc_dbx_DeferredTaxAssetsFixedAndIntangibleAssets_FB8672EF028F572DF67DD352C3ACACC9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_0cc13c2f-6b23-b741-4f28-07325c7e7169" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_d91ede05-f13f-9c89-cfbf-3dfb1dd1a1a6" xlink:to="loc_us-gaap_DeferredTaxAssetsOther_0cc13c2f-6b23-b741-4f28-07325c7e7169" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_d9af76c3-a64a-3b37-1d7d-4e9be8c70af6" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_476b367a-1ad6-eb34-c01b-595b754b8aa8" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_d9af76c3-a64a-3b37-1d7d-4e9be8c70af6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_5ca8e732-540c-5527-8ee3-c835dafc5838" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_c003e837-c7c9-cd10-ae74-916131fdc333" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_5ca8e732-540c-5527-8ee3-c835dafc5838" xlink:type="arc" />
    <link:loc xlink:href="dbx-20181231.xsd#dbx_DeferredTaxLiabilitiesFixedAndIntangibleAssets" xlink:label="loc_dbx_DeferredTaxLiabilitiesFixedAndIntangibleAssets_54900EF44F799C8034BFC38A434EAD95" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_5ca8e732-540c-5527-8ee3-c835dafc5838" xlink:to="loc_dbx_DeferredTaxLiabilitiesFixedAndIntangibleAssets_54900EF44F799C8034BFC38A434EAD95" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOther" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOther_3e7fd080-3ec6-50fa-98f3-b61bc68dbdcf" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_5ca8e732-540c-5527-8ee3-c835dafc5838" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesOther_3e7fd080-3ec6-50fa-98f3-b61bc68dbdcf" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/IncomeTaxesComponentsOfIncomeTaxExpenseBenefitDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_b975ff9b-a11f-f2b5-e104-e0266dbbbfc6" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_b975ff9b-a11f-f2b5-e104-e0266dbbbfc6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_4d365c95-da3d-c3cb-6f6b-7945d285af9f" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_4d365c95-da3d-c3cb-6f6b-7945d285af9f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CurrentForeignTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentForeignTaxExpenseBenefit_bbb5a6cc-fe5e-18f1-e9f0-76884d58b714" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_CurrentForeignTaxExpenseBenefit_bbb5a6cc-fe5e-18f1-e9f0-76884d58b714" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_650e6c8f-1409-4de1-126f-784909f82e64" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_650e6c8f-1409-4de1-126f-784909f82e64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_10aa09ac-60b4-bd88-6c3b-c85b3f0fbf0a" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_10aa09ac-60b4-bd88-6c3b-c85b3f0fbf0a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_840ca4a2-1542-fad2-992c-40136594b396" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_840ca4a2-1542-fad2-992c-40136594b396" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/IncomeTaxesIncomeTaxRateReconciliationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_46fd3e47-b379-3d5b-dad7-1fdc5e88b67f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_46fd3e47-b379-3d5b-dad7-1fdc5e88b67f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_147896db-b2dd-402f-9f5b-8c57c745a45a" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_147896db-b2dd-402f-9f5b-8c57c745a45a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential" xlink:label="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_e9804aa2-0190-55cd-01a9-85d659cee6b2" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_e9804aa2-0190-55cd-01a9-85d659cee6b2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxCredits" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCredits_a3f26c1e-91b7-2880-1113-1647820fec09" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCredits_a3f26c1e-91b7-2880-1113-1647820fec09" xlink:type="arc" />
    <link:loc xlink:href="dbx-20181231.xsd#dbx_EffectiveIncomeTaxRateReconciliationPermanentDifferencesAmount" xlink:label="loc_dbx_EffectiveIncomeTaxRateReconciliationPermanentDifferencesAmount_56E1BB9FC15223323258C36ABEDCC316" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_dbx_EffectiveIncomeTaxRateReconciliationPermanentDifferencesAmount_56E1BB9FC15223323258C36ABEDCC316" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_b8a6f67f-d570-db88-37fa-3568c826ebc5" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_b8a6f67f-d570-db88-37fa-3568c826ebc5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_403b8245-2a5c-b405-4865-11cfdebd2992" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_403b8245-2a5c-b405-4865-11cfdebd2992" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_2fc8d554-3ed0-9aae-a23b-3842180d9904" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_2fc8d554-3ed0-9aae-a23b-3842180d9904" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther_debb22de-4eff-9a44-9569-2ec0efafa179" xlink:type="locator" />
    <link:calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_97bbae57-7f84-4da9-acab-610e56204929" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther_debb22de-4eff-9a44-9569-2ec0efafa179" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/IncomeTaxesNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/IncomeTaxesReconciliationOfUnrecognizedTaxBenefitsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/IncomeTaxesScheduleOfLossFromContinuingOperationsBeforeIncomeTaxesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4d8b6d19-6a54-06aa-2077-c10380bd20d1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_e6f9d43e-fcd6-745d-b634-9ed4792095b2" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4d8b6d19-6a54-06aa-2077-c10380bd20d1" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_e6f9d43e-fcd6-745d-b634-9ed4792095b2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_a4e74316-f31b-80bc-a44a-3464e9dcdb33" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4d8b6d19-6a54-06aa-2077-c10380bd20d1" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_a4e74316-f31b-80bc-a44a-3464e9dcdb33" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/IncomeTaxesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/IntangibleAssetsNet" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/IntangibleAssetsNetScheduleOfFutureAmortizationExpenseDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_423e6bba-f43d-931c-5711-51d5522b2aaa" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_423e6bba-f43d-931c-5711-51d5522b2aaa" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_28c91f3b-370e-e76f-4199-69e4166aabc6" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_28c91f3b-370e-e76f-4199-69e4166aabc6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_f7796428-4176-97fe-5145-79a026d8547a" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_f7796428-4176-97fe-5145-79a026d8547a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_71fd8e03-8eaf-f20c-786b-5e0492fb281b" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_71fd8e03-8eaf-f20c-786b-5e0492fb281b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_8d652bfd-fc92-51b1-30d6-b90c4a94f960" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_8d652bfd-fc92-51b1-30d6-b90c4a94f960" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_0e7343bd-e798-afc0-7fcc-ed296ae9f91c" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_d3bdc20c-5c58-6be6-d756-0ace6a97f212" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_0e7343bd-e798-afc0-7fcc-ed296ae9f91c" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/IntangibleAssetsNetScheduleOfIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_af012273-e8ee-655c-daa2-86b96989d377" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_e52879aa-5fc1-863a-9bc7-07b154238ef5" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_af012273-e8ee-655c-daa2-86b96989d377" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_e52879aa-5fc1-863a-9bc7-07b154238ef5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_c9279b6a-f262-f140-7696-5ec40778343f" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_af012273-e8ee-655c-daa2-86b96989d377" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_c9279b6a-f262-f140-7696-5ec40778343f" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/IntangibleAssetsNetTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/NetLossPerShare" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/NetLossPerShareScheduleOfEarningsPerShareBasicAndDilutedDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/NetLossPerShareScheduleOfPotentiallyDilutiveSecuritiesExcludedFromComputationOfEarningsPerShareDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/NetLossPerShareTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/PropertyAndEquipmentNet" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/PropertyAndEquipmentNetNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/PropertyAndEquipmentNetScheduleOfPropertyAndEquipmentNetDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_f37ad080-c77a-efc5-c936-389b16abc420" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_78662f7f-2a6a-5d68-ba8a-7947ed287be5" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_f37ad080-c77a-efc5-c936-389b16abc420" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_78662f7f-2a6a-5d68-ba8a-7947ed287be5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_0a08cda9-11b3-e7ac-3fc9-3a23c67d9b96" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_f37ad080-c77a-efc5-c936-389b16abc420" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_0a08cda9-11b3-e7ac-3fc9-3a23c67d9b96" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.dropbox.com/role/PropertyAndEquipmentNetTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/RelatedPartyTransactions" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/RelatedPartyTransactionsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/RevolvingCreditFacility" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/RevolvingCreditFacilityDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/StockholdersEquity" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/StockholdersEquityAwardModificationsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/StockholdersEquityCoFounderGrantsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/StockholdersEquityCommonStockDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/StockholdersEquityConvertiblePreferredStockAndPreferredStockDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/StockholdersEquityEquityIncentivePlansDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/StockholdersEquityScheduleOfPreTaxIntrinsicValueDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/StockholdersEquityScheduleOfStockOptionAndRestrictedStockActivityDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/StockholdersEquityTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/SubsequentEvents" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.dropbox.com/role/SubsequentEventsDetails" xlink:type="extended" />
</link:linkbase>
