# Activity Depreciation Calculator

> Calculate depreciation from asset usage such as miles, machine cycles, or operating hours.

Page: https://askcalculators.com/calculator/activity-depreciation-calculator/
Definition: https://askcalculators.com/calculator/activity-depreciation-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/activity-depreciation-calculator/schema.json
Version: 1.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/activity-depreciation-calculator/?cost=50000&salvageValue=5000&totalActivity=100000&priorActivity=20000&periodActivity=12000

## Inputs
- cost: Asset cost; type=money; required; default=50000; min=0
- salvageValue: Salvage value; type=money; required; default=5000; min=0
- totalActivity: Estimated lifetime activity; type=number; required; default=100000; min=0.000001
- priorActivity: Activity before this period; type=number; required; default=20000; min=0
- periodActivity: Activity this period; type=number; required; default=12000; min=0

## Outputs
- depreciationPerUnit: Depreciation per activity unit; format=currency; primary
- periodDepreciation: Current-period depreciation; format=currency
- accumulatedDepreciation: Accumulated depreciation; format=currency
- endingBookValue: Ending book value; format=currency
- remainingActivity: Remaining depreciable activity; format=number

## Formula
depreciation per unit = (cost − salvage) ÷ total estimated activity

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.

Notice: Depreciation rules vary by jurisdiction and reporting purpose. This calculator is educational and is not tax advice.