Straight-Line Depreciation Calculator
Spread depreciable cost evenly over useful life.
Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Straight-line method only; no jurisdiction-specific tax depreciation rules are applied.
Example Calculation
- Asset cost: 12000 $
- Salvage value: 2000 $
- Useful life: 5 years
A $12,000 asset with $2,000 salvage over five years depreciates $2,000 per year.
Frequently asked questions
How do I use this calculator?
Enter asset cost, salvage value, useful life. The result updates automatically. Use Reset to restore the example values.
What method does it use?
Annual depreciation = (cost − salvage) / useful life. Straight-line method only; no jurisdiction-specific tax depreciation rules are applied.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.