Length

Length converter: mm, cm, m, km, inches, feet, yards, miles and nautical miles. Exact conversion with a solution and a table of all units.

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Enter a whole number, a decimal (2.5), a fraction (1/3) or scientific notation (6.02e23).

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The length converter converts meters, centimeters, millimeters and kilometers into each other and into inches, feet, yards, miles, nautical miles, old Russian units (vershok, arshin, sazhen, versta), astronomical units and light-years. The conversion is exact: the factors come from the unit definitions, and the solution shows what to multiply or divide by.

Metric units of length

Unit	In meters	Relation
1 millimeter (mm)	0.001 m	1 cm = 10 mm
1 centimeter (cm)	0.01 m	1 dm = 10 cm
1 decimeter (dm)	0.1 m	1 m = 10 dm
1 meter (m)	1 m	1 m = 100 cm = 1000 mm
1 kilometer (km)	1000 m	1 km = 1000 m

To convert larger units to smaller ones, multiply (5 km = 5 · 1000 = 5000 m); to convert smaller units to larger ones, divide (350 cm = 350 : 100 = 3.5 m).