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Length converters

Metric and imperial lengths: millimeters to miles, inches to centimeters.

1 cm = 0.39370079 in

All length conversions

The units

millimeter (mm)
One thousandth of a meter. Used for engineering drawings, rainfall and screen sizes in some countries.
centimeter (cm)
One hundredth of a meter. The usual metric unit for height, clothing and small objects.
meter (m)
The SI base unit of length, defined by the distance light travels in 1/299,792,458 of a second.
kilometer (km)
1,000 meters. Used for road distances and running races outside the US and UK.
inch (in)
Exactly 2.54 cm since the 1959 international yard agreement. Common for screens, tyres and pipes.
foot (ft)
12 inches, exactly 0.3048 m. Used for height and room sizes in the US, UK and India.
yard (yd)
3 feet or 36 inches, exactly 0.9144 m. Used for sports fields and fabric.
mile (mi)
The statute mile: 5,280 feet or exactly 1,609.344 m. Used for road distances in the US and UK.
nautical mile (nmi)
Exactly 1,852 m, about one minute of latitude. Used in sea and air navigation.
micrometer (µm)
One millionth of a meter, also called a micron. Used for hair width, filters and machining tolerances.

Other converters: Weight, Area, Volume, Temperature, Speed, Data storage, Indian number units.