Convert any length or distance between metric and imperial units. Type a value and see it in every unit at once — from millimetres to miles and nautical miles.
How to use the Length Converter
- Enter a value.
- Choose the unit you are converting from.
- Read the result in all other units, or pick a specific target unit.
Common length conversions
1 inch = 2.54 cm. 1 foot = 12 inches = 30.48 cm. 1 yard = 3 feet = 0.9144 m. 1 mile = 1,760 yards = 1.609344 km. 1 nautical mile = 1,852 m.
Frequently asked questions
How many centimetres are in an inch?
Exactly 2.54 centimetres.
How do I convert km to miles?
Multiply kilometres by 0.621371 (or divide by 1.609344).
How precise are the conversions?
Conversion factors use the exact internationally defined values (e.g. 1 inch = 2.54 cm exactly). Results are shown to up to 10 significant digits.