What this calculator does
Calculate depreciation per unit and depreciation for a production period, with a lifetime-usage schedule summary.
How it works
The calculator evaluates depreciation per unit = (cost − salvage) ÷ estimated total units. Inputs are checked before calculation, and invalid values such as zero denominators or out-of-range selections produce a clear error instead of a misleading result.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
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?cost=Asset costMoney · Required · Default: 100,000
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?salvageValue=Salvage valueMoney · Required · Default: 10,000
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?estimatedTotalUnits=Estimated lifetime unitsNumber · Required · Default: 500,000
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?unitsThisPeriod=Units produced this periodNumber · Required · Default: 60,000
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?unitsBeforePeriod=Units produced before this periodNumber · Required · Default: 120,000
Outputs
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depreciationPerUnitDepreciation per unitCurrency · Primary output
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periodDepreciationPeriod depreciationCurrency
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accumulatedDepreciationAccumulated depreciationCurrency
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endingBookValueEnding book valueCurrency
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remainingUnitsRemaining estimated unitsNumber
Inputs and results
The inputs are Asset cost, Salvage value, Estimated lifetime units, Units produced this period, Units produced before this period. Results include Depreciation per unit, Period depreciation, Accumulated depreciation, Ending book value, Remaining estimated units.
Important notes
Depreciation treatment varies by accounting policy and tax jurisdiction.