<?xml version="1.0" encoding="US-ASCII" standalone="no"?>
    <!-- Field: Doc-Info; Name: Generator; Value: GoFiler Complete; Version: 6.5c -->
    <!-- Field: Doc-Info; Name: VendorURI; Value: https://www.novaworks.com -->
    <!-- Field: Doc-Info; Name: Status; Value: 0x00000000 -->
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#Cover" roleURI="http://fenbo.com/role/Cover" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#InterimCondensedConsolidatedBalanceSheets" roleURI="http://fenbo.com/role/InterimCondensedConsolidatedBalanceSheets" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#InterimCondensedConsolidatedBalanceSheetsParenthetical" roleURI="http://fenbo.com/role/InterimCondensedConsolidatedBalanceSheetsParenthetical" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#InterimCondensedConsolidatedStatementsOfOperationsAndComprehensiveLosses" roleURI="http://fenbo.com/role/InterimCondensedConsolidatedStatementsOfOperationsAndComprehensiveLosses" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#InterimCondensedConsolidatedStatementsOfChangesInShareholdersEquity" roleURI="http://fenbo.com/role/InterimCondensedConsolidatedStatementsOfChangesInShareholdersEquity" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#InterimCondensedConsolidatedStatementsOfCashFlows" roleURI="http://fenbo.com/role/InterimCondensedConsolidatedStatementsOfCashFlows" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#GeneralInformation" roleURI="http://fenbo.com/role/GeneralInformation" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#BasisOfPresentation" roleURI="http://fenbo.com/role/BasisOfPresentation" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#AccountsReceivableNet" roleURI="http://fenbo.com/role/AccountsReceivableNet" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#Inventories" roleURI="http://fenbo.com/role/Inventories" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#PrepaidExpensesAndOtherCurrentAssets" roleURI="http://fenbo.com/role/PrepaidExpensesAndOtherCurrentAssets" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#PropertyPlantsAndEquipmentNet" roleURI="http://fenbo.com/role/PropertyPlantsAndEquipmentNet" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#Right-of-useAssetsAndOperatingLeaseLiabilities" roleURI="http://fenbo.com/role/Right-of-useAssetsAndOperatingLeaseLiabilities" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#OtherPayablesAndAccruedLiabilities" roleURI="http://fenbo.com/role/OtherPayablesAndAccruedLiabilities" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#CreditFacilities" roleURI="http://fenbo.com/role/CreditFacilities" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#RelatedPartyBalancesAndTransactions" roleURI="http://fenbo.com/role/RelatedPartyBalancesAndTransactions" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#EmployeeBenefitsGovernmentPlan" roleURI="http://fenbo.com/role/EmployeeBenefitsGovernmentPlan" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#IncomeTaxes" roleURI="http://fenbo.com/role/IncomeTaxes" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ShareholdersEquity" roleURI="http://fenbo.com/role/ShareholdersEquity" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#NetLossPerShare" roleURI="http://fenbo.com/role/NetLossPerShare" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#CommitmentsAndContingencies" roleURI="http://fenbo.com/role/CommitmentsAndContingencies" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#RestrictedNetAssets" roleURI="http://fenbo.com/role/RestrictedNetAssets" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#SubsequentEvents" roleURI="http://fenbo.com/role/SubsequentEvents" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#BasisOfPresentationPolicies" roleURI="http://fenbo.com/role/BasisOfPresentationPolicies" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#GeneralInformationTables" roleURI="http://fenbo.com/role/GeneralInformationTables" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#AccountsReceivableNetTables" roleURI="http://fenbo.com/role/AccountsReceivableNetTables" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#InventoriesTables" roleURI="http://fenbo.com/role/InventoriesTables" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#PrepaidExpensesAndOtherCurrentAssetsTables" roleURI="http://fenbo.com/role/PrepaidExpensesAndOtherCurrentAssetsTables" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#PropertyPlantsAndEquipmentNetTables" roleURI="http://fenbo.com/role/PropertyPlantsAndEquipmentNetTables" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#Right-of-useAssetsAndOperatingLeaseLiabilitiesTables" roleURI="http://fenbo.com/role/Right-of-useAssetsAndOperatingLeaseLiabilitiesTables" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#OtherPayablesAndAccruedLiabilitiesTables" roleURI="http://fenbo.com/role/OtherPayablesAndAccruedLiabilitiesTables" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#CreditFacilitiesTables" roleURI="http://fenbo.com/role/CreditFacilitiesTables" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#RelatedPartyBalancesAndTransactionsTables" roleURI="http://fenbo.com/role/RelatedPartyBalancesAndTransactionsTables" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#IncomeTaxesTables" roleURI="http://fenbo.com/role/IncomeTaxesTables" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#NetLossPerShareTables" roleURI="http://fenbo.com/role/NetLossPerShareTables" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ScheduleOfCompanyAndItsSubsidiariesDetails" roleURI="http://fenbo.com/role/ScheduleOfCompanyAndItsSubsidiariesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#BasisOfPresentationDetailsNarrative" roleURI="http://fenbo.com/role/BasisOfPresentationDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ScheduleOfAccountsReceivableNetDetails" roleURI="http://fenbo.com/role/ScheduleOfAccountsReceivableNetDetails" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ScheduleOfInventoriesDetails" roleURI="http://fenbo.com/role/ScheduleOfInventoriesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ScheduleOfPrepaymentDepositAndOtherReceivablesDetails" roleURI="http://fenbo.com/role/ScheduleOfPrepaymentDepositAndOtherReceivablesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ScheduleOfPropertyPlantsAndEquipmentNetDetails" roleURI="http://fenbo.com/role/ScheduleOfPropertyPlantsAndEquipmentNetDetails" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#PropertyPlantsAndEquipmentNetDetailsNarrative" roleURI="http://fenbo.com/role/PropertyPlantsAndEquipmentNetDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ScheduleOfNon-cancellableLeaseContractsDetails" roleURI="http://fenbo.com/role/ScheduleOfNon-cancellableLeaseContractsDetails" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ScheduleOfCondensedBalanceSheetDetails" roleURI="http://fenbo.com/role/ScheduleOfCondensedBalanceSheetDetails" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ScheduleOfFutureUndiscountedLeasePaymentsDetails" roleURI="http://fenbo.com/role/ScheduleOfFutureUndiscountedLeasePaymentsDetails" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ScheduleOfOtherPayablesAndAccruedLiabilitiesDetails" roleURI="http://fenbo.com/role/ScheduleOfOtherPayablesAndAccruedLiabilitiesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ScheduleOfBankLoanDetails" roleURI="http://fenbo.com/role/ScheduleOfBankLoanDetails" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ScheduleOfBankLoanDetailsParenthetical" roleURI="http://fenbo.com/role/ScheduleOfBankLoanDetailsParenthetical" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#CreditFacilitiesDetailsNarrative" roleURI="http://fenbo.com/role/CreditFacilitiesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ScheduleOfRelatedPartyBalancesDetails" roleURI="http://fenbo.com/role/ScheduleOfRelatedPartyBalancesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ScheduleOfRentalAgreementWithRelatedPartyDetails" roleURI="http://fenbo.com/role/ScheduleOfRentalAgreementWithRelatedPartyDetails" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#RelatedPartyBalancesAndTransactionsDetailsNarrative" roleURI="http://fenbo.com/role/RelatedPartyBalancesAndTransactionsDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ScheduleOfProvisionIncomeTaxesDetails" roleURI="http://fenbo.com/role/ScheduleOfProvisionIncomeTaxesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ScheduleOfReconciliationOfIncomeBeforeIncomeTaxExpenseDetails" roleURI="http://fenbo.com/role/ScheduleOfReconciliationOfIncomeBeforeIncomeTaxExpenseDetails" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#IncomeTaxesDetailsNarrative" roleURI="http://fenbo.com/role/IncomeTaxesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ShareholdersEquityDetailsNarrative" roleURI="http://fenbo.com/role/ShareholdersEquityDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#ScheduleOfNetIncomeLossPerShareDetails" roleURI="http://fenbo.com/role/ScheduleOfNetIncomeLossPerShareDetails" />
    <link:roleRef xlink:type="simple" xlink:href="febo-20260630.xsd#SubsequentEventsDetailsNarrative" roleURI="http://fenbo.com/role/SubsequentEventsDetailsNarrative" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/Cover" xlink:title="00000001 - Document - Cover" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/InterimCondensedConsolidatedBalanceSheets" xlink:title="00000002 - Statement - Interim Condensed Consolidated Balance Sheets (Unaudited)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaapAssetsCurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaapCashAndCashEquivalentsAtCarryingValue" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapCashAndCashEquivalentsAtCarryingValue" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaapAccountsReceivableNetCurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapAccountsReceivableNetCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaapInventoryNet" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapInventoryNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaapPrepaidExpenseAndOtherAssetsCurrent" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapPrepaidExpenseAndOtherAssetsCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsNoncurrent" xlink:label="loc_us-gaapAssetsNoncurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaapPropertyPlantAndEquipmentNet" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapPropertyPlantAndEquipmentNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaapOperatingLeaseRightOfUseAsset" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapOperatingLeaseRightOfUseAsset" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets" xlink:label="loc_us-gaapAssets" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssets" xlink:to="loc_us-gaapAssetsCurrent" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssets" xlink:to="loc_us-gaapAssetsNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaapLiabilitiesCurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermBankLoansAndNotesPayable" xlink:label="loc_us-gaapShortTermBankLoansAndNotesPayable" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapShortTermBankLoansAndNotesPayable" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaapAccountsPayableCurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapAccountsPayableCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaapAccruedLiabilitiesCurrent" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapAccruedLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="loc_us-gaapOperatingLeaseLiabilityCurrent" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapOperatingLeaseLiabilityCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="loc_us-gaapOtherLiabilitiesCurrent" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapOtherLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaapLiabilities" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilities" xlink:to="loc_us-gaapLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaapOperatingLeaseLiabilityNoncurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilities" xlink:to="loc_us-gaapOperatingLeaseLiabilityNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaapStockholdersEquity" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaapCommonStockValue" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapCommonStockValue" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaapAdditionalPaidInCapital" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapAdditionalPaidInCapital" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="febo-20260630.xsd#FEBO_StatutoryReserve" xlink:label="loc_FEBOStatutoryReserve" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_FEBOStatutoryReserve" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaapRetainedEarningsAccumulatedDeficit" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapRetainedEarningsAccumulatedDeficit" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaapAccumulatedOtherComprehensiveIncomeLossNetOfTax" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapAccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaapLiabilitiesAndStockholdersEquity" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesAndStockholdersEquity" xlink:to="loc_us-gaapLiabilities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaapCommitmentsAndContingencies" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesAndStockholdersEquity" xlink:to="loc_us-gaapCommitmentsAndContingencies" xlink:type="arc" weight="1" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesAndStockholdersEquity" xlink:to="loc_us-gaapStockholdersEquity" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/InterimCondensedConsolidatedBalanceSheetsParenthetical" xlink:title="00000003 - Statement - Interim Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/InterimCondensedConsolidatedStatementsOfOperationsAndComprehensiveLosses" xlink:title="00000004 - Statement - Interim Condensed Consolidated Statements of Operations and Comprehensive Losses (Unaudited)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaapGrossProfit" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaapRevenueFromContractWithCustomerExcludingAssessedTax" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapGrossProfit" xlink:to="loc_us-gaapRevenueFromContractWithCustomerExcludingAssessedTax" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="loc_us-gaapCostOfGoodsAndServicesSold" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapGrossProfit" xlink:to="loc_us-gaapCostOfGoodsAndServicesSold" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaapOperatingExpenses" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="loc_us-gaapSellingAndMarketingExpense" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapSellingAndMarketingExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaapGeneralAndAdministrativeExpense" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapGeneralAndAdministrativeExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaapOperatingIncomeLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingIncomeLoss" xlink:to="loc_us-gaapGrossProfit" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingIncomeLoss" xlink:to="loc_us-gaapOperatingExpenses" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaapNonoperatingIncomeExpense" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax" xlink:label="loc_us-gaapForeignCurrencyTransactionGainLossBeforeTax" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_us-gaapForeignCurrencyTransactionGainLossBeforeTax" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaapInvestmentIncomeInterest" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_us-gaapInvestmentIncomeInterest" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNonoperating" xlink:label="loc_us-gaapInterestExpenseNonoperating" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_us-gaapInterestExpenseNonoperating" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="febo-20260630.xsd#FEBO_GovernmentGrant" xlink:label="loc_FEBOGovernmentGrant" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_FEBOGovernmentGrant" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncome" xlink:label="loc_us-gaapOtherNonoperatingIncome" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_us-gaapOtherNonoperatingIncome" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_us-gaapOperatingIncomeLoss" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_us-gaapNonoperatingIncomeExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaapNetIncomeLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLoss" xlink:to="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaapIncomeTaxExpenseBenefit" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLoss" xlink:to="loc_us-gaapIncomeTaxExpenseBenefit" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaapComprehensiveIncomeNetOfTax" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapComprehensiveIncomeNetOfTax" xlink:to="loc_us-gaapNetIncomeLoss" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="loc_us-gaapOtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapComprehensiveIncomeNetOfTax" xlink:to="loc_us-gaapOtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/InterimCondensedConsolidatedStatementsOfChangesInShareholdersEquity" xlink:title="00000005 - Statement - Interim Condensed Consolidated Statements of Changes in Shareholders&apos; Equity (Unaudited)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/InterimCondensedConsolidatedStatementsOfCashFlows" xlink:title="00000006 - Statement - Interim Condensed Consolidated Statements of Cash Flows (Unaudited)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaapNetIncomeLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapNetIncomeLoss" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaapDepreciation" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapDepreciation" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaapIncreaseDecreaseInAccountsReceivable" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInAccountsReceivable" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaapIncreaseDecreaseInInventories" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInInventories" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaapIncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="loc_us-gaapIncreaseDecreaseInAccountsPayable" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInAccountsPayable" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaapIncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaapPaymentsToAcquirePropertyPlantAndEquipment" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_us-gaapPaymentsToAcquirePropertyPlantAndEquipment" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfBankDebt" xlink:label="loc_us-gaapRepaymentsOfBankDebt" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapRepaymentsOfBankDebt" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromBankDebt" xlink:label="loc_us-gaapProceedsFromBankDebt" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromBankDebt" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromRepaymentsOfRelatedPartyDebt" xlink:label="loc_us-gaapProceedsFromRepaymentsOfRelatedPartyDebt" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromRepaymentsOfRelatedPartyDebt" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:label="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:to="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:to="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" xlink:type="arc" weight="1" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:to="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/GeneralInformation" xlink:title="999007 - Disclosure - General information" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/BasisOfPresentation" xlink:title="999008 - Disclosure - Basis of presentation" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/AccountsReceivableNet" xlink:title="999009 - Disclosure - Accounts receivable, net" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/Inventories" xlink:title="999010 - Disclosure - Inventories" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/PrepaidExpensesAndOtherCurrentAssets" xlink:title="999011 - Disclosure - Prepaid expenses and other current assets" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/PropertyPlantsAndEquipmentNet" xlink:title="999012 - Disclosure - Property, plants and equipment, net" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/Right-of-useAssetsAndOperatingLeaseLiabilities" xlink:title="999013 - Disclosure - Right-of-use assets and operating lease liabilities" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/OtherPayablesAndAccruedLiabilities" xlink:title="999014 - Disclosure - Other payables and accrued liabilities" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/CreditFacilities" xlink:title="999015 - Disclosure - Credit facilities" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/RelatedPartyBalancesAndTransactions" xlink:title="999016 - Disclosure - Related party balances and transactions" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/EmployeeBenefitsGovernmentPlan" xlink:title="999017 - Disclosure - Employee benefits government plan" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/IncomeTaxes" xlink:title="999018 - Disclosure - Income taxes" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ShareholdersEquity" xlink:title="999019 - Disclosure - Shareholders&#8217; equity" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/NetLossPerShare" xlink:title="999020 - Disclosure - Net Loss Per Share" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/CommitmentsAndContingencies" xlink:title="999021 - Disclosure - Commitments and Contingencies" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/RestrictedNetAssets" xlink:title="999022 - Disclosure - Restricted net assets" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/SubsequentEvents" xlink:title="999023 - Disclosure - Subsequent Events" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/BasisOfPresentationPolicies" xlink:title="999024 - Disclosure - Basis of presentation (Policies)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/GeneralInformationTables" xlink:title="999025 - Disclosure - General information (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/AccountsReceivableNetTables" xlink:title="999026 - Disclosure - Accounts receivable, net (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/InventoriesTables" xlink:title="999027 - Disclosure - Inventories (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/PrepaidExpensesAndOtherCurrentAssetsTables" xlink:title="999028 - Disclosure - Prepaid expenses and other current assets (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/PropertyPlantsAndEquipmentNetTables" xlink:title="999029 - Disclosure - Property, plants and equipment, net (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/Right-of-useAssetsAndOperatingLeaseLiabilitiesTables" xlink:title="999030 - Disclosure - Right-of-use assets and operating lease liabilities (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/OtherPayablesAndAccruedLiabilitiesTables" xlink:title="999031 - Disclosure - Other payables and accrued liabilities (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/CreditFacilitiesTables" xlink:title="999032 - Disclosure - Credit facilities (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/RelatedPartyBalancesAndTransactionsTables" xlink:title="999033 - Disclosure - Related party balances and transactions (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/IncomeTaxesTables" xlink:title="999034 - Disclosure - Income taxes (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/NetLossPerShareTables" xlink:title="999035 - Disclosure - Net Loss Per Share (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ScheduleOfCompanyAndItsSubsidiariesDetails" xlink:title="999036 - Disclosure - Schedule of company and its subsidiaries (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/BasisOfPresentationDetailsNarrative" xlink:title="999037 - Disclosure - Basis of presentation (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ScheduleOfAccountsReceivableNetDetails" xlink:title="999038 - Disclosure - Schedule of accounts receivable net (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNet" xlink:label="loc_us-gaapAccountsReceivableNet" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableGross" xlink:label="loc_us-gaapAccountsReceivableGross" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccountsReceivableNet" xlink:to="loc_us-gaapAccountsReceivableGross" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable" xlink:label="loc_us-gaapAllowanceForDoubtfulAccountsReceivable" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccountsReceivableNet" xlink:to="loc_us-gaapAllowanceForDoubtfulAccountsReceivable" xlink:type="arc" weight="-1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ScheduleOfInventoriesDetails" xlink:title="999039 - Disclosure - Schedule of inventories (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaapInventoryNet" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryRawMaterials" xlink:label="loc_us-gaapInventoryRawMaterials" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapInventoryNet" xlink:to="loc_us-gaapInventoryRawMaterials" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryWorkInProcess" xlink:label="loc_us-gaapInventoryWorkInProcess" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapInventoryNet" xlink:to="loc_us-gaapInventoryWorkInProcess" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryFinishedGoods" xlink:label="loc_us-gaapInventoryFinishedGoods" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapInventoryNet" xlink:to="loc_us-gaapInventoryFinishedGoods" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ScheduleOfPrepaymentDepositAndOtherReceivablesDetails" xlink:title="999040 - Disclosure - Schedule of prepayment deposit and other receivables (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaapPrepaidExpenseAndOtherAssetsCurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepositsAssetsCurrent" xlink:label="loc_us-gaapDepositsAssetsCurrent" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapPrepaidExpenseAndOtherAssetsCurrent" xlink:to="loc_us-gaapDepositsAssetsCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValueAddedTaxReceivableCurrent" xlink:label="loc_us-gaapValueAddedTaxReceivableCurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapPrepaidExpenseAndOtherAssetsCurrent" xlink:to="loc_us-gaapValueAddedTaxReceivableCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseCurrent" xlink:label="loc_us-gaapPrepaidExpenseCurrent" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapPrepaidExpenseAndOtherAssetsCurrent" xlink:to="loc_us-gaapPrepaidExpenseCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReceivable" xlink:label="loc_us-gaapIncomeTaxReceivable" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapPrepaidExpenseAndOtherAssetsCurrent" xlink:to="loc_us-gaapIncomeTaxReceivable" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherReceivablesNetCurrent" xlink:label="loc_us-gaapOtherReceivablesNetCurrent" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapPrepaidExpenseAndOtherAssetsCurrent" xlink:to="loc_us-gaapOtherReceivablesNetCurrent" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ScheduleOfPropertyPlantsAndEquipmentNetDetails" xlink:title="999041 - Disclosure - Schedule of property plants and equipment net (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaapPropertyPlantAndEquipmentNet" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaapPropertyPlantAndEquipmentGross" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapPropertyPlantAndEquipmentNet" xlink:to="loc_us-gaapPropertyPlantAndEquipmentGross" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaapAccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapPropertyPlantAndEquipmentNet" xlink:to="loc_us-gaapAccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:type="arc" weight="-1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/PropertyPlantsAndEquipmentNetDetailsNarrative" xlink:title="999042 - Disclosure - Property, plants and equipment, net (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ScheduleOfNon-cancellableLeaseContractsDetails" xlink:title="999043 - Disclosure - Schedule of non-cancellable lease contracts (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ScheduleOfCondensedBalanceSheetDetails" xlink:title="999044 - Disclosure - Schedule of condensed balance sheet (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiability" xlink:label="loc_us-gaapOperatingLeaseLiability" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="loc_us-gaapOperatingLeaseLiabilityCurrent" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingLeaseLiability" xlink:to="loc_us-gaapOperatingLeaseLiabilityCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaapOperatingLeaseLiabilityNoncurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingLeaseLiability" xlink:to="loc_us-gaapOperatingLeaseLiabilityNoncurrent" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ScheduleOfFutureUndiscountedLeasePaymentsDetails" xlink:title="999045 - Disclosure - Schedule of future undiscounted lease payments (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:label="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDue" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear" xlink:label="loc_us-gaapPurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="loc_us-gaapPurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:label="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="loc_us-gaapLesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ScheduleOfOtherPayablesAndAccruedLiabilitiesDetails" xlink:title="999046 - Disclosure - Schedule of other payables and accrued liabilities (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaapAccruedLiabilitiesCurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaapEmployeeRelatedLiabilitiesCurrent" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccruedLiabilitiesCurrent" xlink:to="loc_us-gaapEmployeeRelatedLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNotesPayable" xlink:label="loc_us-gaapOtherNotesPayable" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAccruedLiabilitiesCurrent" xlink:to="loc_us-gaapOtherNotesPayable" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ScheduleOfBankLoanDetails" xlink:title="999047 - Disclosure - Schedule of bank loan (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ScheduleOfBankLoanDetailsParenthetical" xlink:title="999048 - Disclosure - Schedule of bank loan (Details) (Parenthetical)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/CreditFacilitiesDetailsNarrative" xlink:title="999049 - Disclosure - Credit facilities (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ScheduleOfRelatedPartyBalancesDetails" xlink:title="999050 - Disclosure - Schedule of related party balances (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ScheduleOfRentalAgreementWithRelatedPartyDetails" xlink:title="999051 - Disclosure - Schedule of rental agreement with related party (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/RelatedPartyBalancesAndTransactionsDetailsNarrative" xlink:title="999052 - Disclosure - Related party balances and transactions (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ScheduleOfProvisionIncomeTaxesDetails" xlink:title="999053 - Disclosure - Schedule of provision income taxes (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ScheduleOfReconciliationOfIncomeBeforeIncomeTaxExpenseDetails" xlink:title="999054 - Disclosure - Schedule of reconciliation of income before income tax expense (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaapIncomeTaxExpenseBenefit" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential" xlink:label="loc_us-gaapIncomeTaxReconciliationForeignIncomeTaxRateDifferential" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeTaxExpenseBenefit" xlink:to="loc_us-gaapIncomeTaxReconciliationForeignIncomeTaxRateDifferential" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="febo-20260630.xsd#FEBO_EffectOfDifferentTaxRatesAvailableToDifferentJurisdictions" xlink:label="loc_FEBOEffectOfDifferentTaxRatesAvailableToDifferentJurisdictions" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeTaxExpenseBenefit" xlink:to="loc_FEBOEffectOfDifferentTaxRatesAvailableToDifferentJurisdictions" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpense" xlink:label="loc_us-gaapIncomeTaxReconciliationNondeductibleExpense" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeTaxExpenseBenefit" xlink:to="loc_us-gaapIncomeTaxReconciliationNondeductibleExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="febo-20260630.xsd#FEBO_IncomeTaxReconciliationUnderProvision" xlink:label="loc_FEBOIncomeTaxReconciliationUnderProvision" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeTaxExpenseBenefit" xlink:to="loc_FEBOIncomeTaxReconciliationUnderProvision" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaapIncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeTaxExpenseBenefit" xlink:to="loc_us-gaapIncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/IncomeTaxesDetailsNarrative" xlink:title="999055 - Disclosure - Income taxes (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ShareholdersEquityDetailsNarrative" xlink:title="999056 - Disclosure - Shareholders&#8217; equity (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/ScheduleOfNetIncomeLossPerShareDetails" xlink:title="999057 - Disclosure - Schedule of net income (loss) per share (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://fenbo.com/role/SubsequentEventsDetailsNarrative" xlink:title="999058 - Disclosure - Subsequent Events (Details Narrative)" />
</link:linkbase>
