# Depreciation Calculator

> Depreciation calculator: compute straight line, declining balance, and sum of years digits depreciation schedules by asset. Free, runs in your browser.

- **Canonical URL:** https://boringtoolskit.com/depreciation-calculator/
- **Category:** Everyday Calculators
- **Evidence level:** authored-methodology
- **Reviewed:** August 2026
- **Last verified:** 2026-10-12
- **Privacy:** Inputs and results stay in this browser unless the page clearly labels an external request.

## How it works

Straight-line: annual = (cost - salvage) / useful years; book value declines by that amount each year.

## Worked example

A $50,000 asset with $5,000 salvage over 5 years: $9,000 of depreciation a year, ending at $5,000 book value.

## Sources

- [Calculation methodology and verification standard](/methodology/)

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