Length Converter — Meters, Feet, Inches, Miles, KM & More

Type a value, pick two units, get the answer instantly — 10 length units, exact factors, works offline in your browser.

Quick answer: Free length converter: convert meters, feet, inches, cm, km, miles, yards and mm instantly. Accurate to 6 decimals, works offline, nothing uploaded.

Value

→

–result

How to use

Type the value you want to convert.
Pick the from-unit and to-unit.
The result updates instantly — copy it and go.

About this tool

Length conversions come up everywhere — furniture shopping, school homework, travel, running distances. This converter uses exact international factors (1 inch = 25.4 mm, 1 mile = 1609.344 m) and rounds sensibly, so results match official references. Everything computes locally on your device — no network, no waiting.

FAQ

How accurate is this length converter?

It uses exact international definitions (inch=25.4mm, mile=1609.344m) and shows up to 6 decimals — matches official NIST/SI references.

Does it work offline?

Yes — every conversion is computed on your device; after the page loads you can go offline and keep converting.

Can I convert feet-and-inches like 5'9?

Convert the feet (5) and inches (9) separately, or type 5.75 ft for 5 ft 9 in — the result matches to the millimetre.

Is it free on mobile?

Completely — no app, no signup; the page is mobile-first and works on iPhone and Android.

Which units are supported?

mm, cm, m, km, inch, foot, yard, mile, nautical mile and micrometer.

Why do some results show many decimals?

Small inputs in big units create long decimals — the tool shows up to 6 significant decimals; round as your task needs.

Rate this tool

Your rating stays in this browser (local storage) — nothing is sent to any server.

Related tools

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The complete length converter guide

Prefer the long version — a worked example, the mistakes people actually make, and answers to real questions? The blog guide Length Converter — Complete Guide, Mistakes & FAQ covers all of it step by step.

Browse the collection: Calculators — All 96 Free Online Tools

Length Converter — Meters, Feet, Inches, Miles, KM & More

How to use

About this tool

FAQ

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