Length Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles — instantly, in your browser.
Convert between millimetres, centimetres, metres, kilometres, inches, feet, yards and miles. The conversion happens in your browser as you type.
How to use it
- Enter a length.
- Choose the unit you have and the unit you want.
- Read the result, shown to several decimal places.
Exact definitions
The imperial units are defined in metric terms: 1 inch = 2.54 cm, 1 foot = 0.3048 m, 1 yard = 0.9144 m and 1 mile = 1,609.344 m. So the conversions are exact, not approximations.
- 5 miles = 8.04672 km.
- 6 feet = 182.88 cm.
Rules of thumb
A kilometre is about 0.62 miles, a metre is a little over a yard, and an inch is about two and a half centimetres. For heights written in feet and inches use the Height Converter.
The length conversion guide has more.
FAQs
Are US and UK inches the same?
Yes. Since 1959 the inch has been exactly 25.4 mm in both countries.
Does it include nautical miles?
No. A nautical mile is 1,852 metres and is not one of the units listed.