Length Converter

How to use it

Enter an amount Type the length you want to convert.
Pick the unit you're starting from Choose it in the "From" menu.
Read the conversions Every other unit updates instantly below.

Examples

1 mile	1.609 km
6 feet	1.829 m
1 inch	2.54 cm

About this tool

Length is the measurement most of us convert most often — between the metric units used in most of the world and the imperial units common in the United States and, for some purposes, the UK.

This converter is exact: each unit is defined by an internationally agreed factor (an inch is exactly 2.54 cm, a mile exactly 1,609.344 m), so the results are not rounded approximations. It covers everyday units like kilometres, metres, centimetres, miles, yards, feet and inches, plus small scientific units and the nautical mile used in aviation and at sea.

Everything runs in your browser, so conversions are instant and nothing you type is sent anywhere.

Frequently asked questions

How many centimetres are in an inch?

Exactly 2.54 cm. The inch is defined as 0.0254 metres.

How many feet are in a mile?

A mile is 5,280 feet, or exactly 1,609.344 metres.

Is a nautical mile the same as a mile?

No. A nautical mile is 1,852 metres, about 15% longer than a statute mile (1,609.344 m).

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Updated June 12, 2026