Depreciation Calculator

Calculate asset depreciation with straight-line, declining balance, double-declining or sum-of-years methods and a full schedule.

How do I calculate depreciation?

Enter the asset cost, salvage value and useful life, choose a method and get the yearly depreciation, accumulated depreciation and book value for every year. Straight-line spreads the cost evenly; declining methods expense more early and switch to straight-line when that becomes larger.

Formulas

Straight-line: (cost − salvage) ÷ useful life.
Double-declining balance: book value × 2 ÷ life each year.
Sum-of-the-years’ digits: (cost − salvage) × remaining life ÷ (1 + 2 + … + life).

Example

A $10,000 machine with a $1,000 salvage value and 5-year life depreciates $1,800 a year on a straight-line basis.

Frequently asked questions

Which method should I use?

Straight-line is most common; tax rules in your country may require a specific method.

Does it include partial years?

No, it assumes full years.

Is it free?

Yes.