Straight-Line Depreciation Calculator
Calculate annual depreciation expense, book value and a full depreciation schedule using the straight-line method free in your browser.
Enter Values
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Enter the cost, salvage value and useful life.
- Press Calculate.
How it works
Annual depreciation = (cost − salvage value) ÷ useful life — the asset loses the same amount each year.
Worked example
$10,000 asset, $2,000 salvage, 5 years. = $1,600 a year.
Common mistakes
- Forgetting the salvage (residual) value — depreciation is on cost minus salvage.
- Using straight-line where the asset actually loses value faster early on.
Frequently asked questions
How does straight-line depreciation work?
It spreads (cost − salvage value) evenly over the asset's useful life — the same amount each year.
When isn't it suitable?
For assets that lose value fast early (cars, tech), a declining-balance method may fit better.
What is salvage value?
The estimated worth of the asset at the end of its useful life — what you could sell it for. Depreciation spreads the cost above salvage evenly across the years.
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Cite this tool
Zerdly. (2026). Straight-Line Depreciation Calculator. Retrieved from https://www.zerdly.com/tools/straight-line-depreciation-calculator/
Tip: Enter any known values to calculate the remaining results.
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