Length Converter
Convert length and distance between metric and imperial units: metres, centimetres, kilometres, inches, feet, yards, miles and nautical miles.
Value
Equivalents
- Millimetres
- 1,000
- Centimetres
- 100
- Metres
- 1
- Kilometres
- 0.001
- Inches
- 39.3701
- Feet
- 3.2808
- Yards
- 1.0936
- Miles
- 0.000621
- Nautical miles
- 0.00054
What this tool is for
Type a value once and see it in every unit at the same time, rather than choosing a target first. Conversions use the exact international definitions, where an inch is precisely 25.4 millimetres.
How to use it
- Enter a value in whichever unit you have.
- Read the equivalents in every other unit at once.
- Copy the one you need.
Frequently asked questions
How many centimetres in an inch?
Exactly 2.54, by international agreement since 1959. It is a definition rather than a measurement, so there is no rounding involved.
What is a nautical mile?
1852 metres exactly, originally one minute of latitude. It is used in aviation and at sea, which is also why speed there is measured in knots, one nautical mile per hour.