How to use this calculator
- Enter asset depreciable cost, residual value, useful life in whole years, depreciation method.
- Choose a display currency, then select Calculate. Results also update after a brief pause while you edit.
- Read the result with the assumptions below. Export details or save a second scenario to compare your choices.
Formula and method
Assumptions and limitations
Residual cannot exceed cost. Whole years and full-year charges only. This is book mathematics, not a country tax allowance schedule.
Worked example
Cost 10,000, residual 1,000 and five-year straight-line life gives annual depreciation 1,800 and closing book value 1,000.
What the result means
Compare book depreciation methods with a schedule that stops at the entered residual value.
Common questions
How is the calculation performed?
Straight line: (cost−residual)/life. Double declining: 2/life × opening book value, switching to remaining straight line when larger. SYD: depreciable base × remaining-life / sum of years.
What does the model leave out?
Residual cannot exceed cost. Whole years and full-year charges only. This is book mathematics, not a country tax allowance schedule.
Methodology and transparency
Calculation specification reviewed on 2026-10-14. Mathematical implementation is tested against independent reference fixtures. This does not imply review by a licensed financial professional. Read the testing and precision policy.