About the Depreciation Rate Calculator
Annual depreciation rate from cost, salvage value and useful life — straight-line and equivalent declining rate.
Also known as: rate of depreciation, annual depreciation percentage.
How to use this calculator
- Enter cost, salvage value, useful life.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
SL rate = 1 / life · Declining = 1 − (salvage/cost)^(1/life)
Worked example
Using the values pre-filled in the calculator above:
- Cost = 20,000
- Salvage value = 3,000
- Useful life = 7 years
the calculator returns:
- Straight-line rate: 14.29%
- Declining rate reaching salvage: 23.74%
- Double-declining rate: 28.57%