What this calculator does
Calculate depreciation from asset usage such as miles, machine cycles, or operating hours.
How it works
The calculator evaluates depreciation per unit = (cost − salvage) ÷ total estimated activity. 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: 50,000
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?salvageValue=Salvage valueMoney · Required · Default: 5,000
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?totalActivity=Estimated lifetime activityNumber · Required · Default: 100,000
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?priorActivity=Activity before this periodNumber · Required · Default: 20,000
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?periodActivity=Activity this periodNumber · Required · Default: 12,000
Outputs
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depreciationPerUnitDepreciation per activity unitCurrency · Primary output
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periodDepreciationCurrent-period depreciationCurrency
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accumulatedDepreciationAccumulated depreciationCurrency
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endingBookValueEnding book valueCurrency
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remainingActivityRemaining depreciable activityNumber
Inputs and results
The inputs are Asset cost, Salvage value, Estimated lifetime activity, Activity before this period, Activity this period. Results include Depreciation per activity unit, Current-period depreciation, Accumulated depreciation, Ending book value, Remaining depreciable activity.
Important notes
Depreciation rules vary by jurisdiction and reporting purpose. This calculator is educational and is not tax advice.