Length Converter

Convert between every common length unit. Pick the units, type a value, and the result updates instantly.

Length units

Unit	Symbol	What it is
millimeter	mm	One thousandth of a meter, used for small measurements, engineering drawings and screen sizes.
centimeter	cm	One hundredth of a meter. The everyday metric unit for body height, clothing and 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 distances between places in almost every country.
inch	in	Exactly 2.54 cm since 1959. Used in the US and UK for screens, height, and small lengths.
foot	ft	12 inches, exactly 30.48 cm. Used for height and room sizes in the US and UK.
yard	yd	3 feet, exactly 0.9144 m. Used for fabric, sports fields and golf.
mile	mi	5,280 feet, exactly 1,609.344 m. Used for road distances in the US and UK.
nautical mile	nmi	Exactly 1,852 m. Used at sea and in aviation.