Measure Depreciation
Depreciation spreads an asset's depreciable cost over its useful life.
Formula: Straight-line depreciation = (Cost β Salvage Value) Γ· Useful Life.
A calculator can make the arithmetic faster, but the assumptions still matter. Check whether the result is a percentage, currency amount, ratio, or rate before comparing it with another figure.
Use the displayed formula as a quick audit trail when checking a result or explaining it to someone else.