Length Converter

Convert between metric and imperial lengths

How to use

1. Enter a value and choose the unit you're converting from.
2. Pick the unit you want to convert to.
3. The converted result appears instantly.

Why use this tool

• Metric & imperial: Convert between mm, cm, m, km, inches, feet, yards, and miles.
• Instant & accurate: Results update as you type, using precise conversion factors.
• 100% private: Everything runs in your browser. Your data is never uploaded to a server, so it's safe for confidential content.

Frequently asked questions

Which length units are supported?

Common metric and imperial units including millimetres, centimetres, metres, kilometres, inches, feet, yards, and miles.

How accurate are the conversions?

They use standard exact conversion factors, so results are precise for everyday and technical use.

Does it work offline?

Yes — the math runs in your browser with no server needed.

Back to all tools