Length converter

Length measures the distance between two points. Convert metric units (millimeters, centimeters, meters, kilometers), imperial and US units (inches, feet, yards, miles) and nautical miles. Since 1959 the inch has been defined as exactly 2.54 cm, so these conversions are exact.

1 cm = 0.3937008 in Open full converter β†’

Length units

  • Millimeter (mm) β€” The millimeter (mm) is a unit of length in the International System of Units (SI). 1 millimeter equals 0.001 meters. This value is exact by definition.
  • Centimeter (cm) β€” The centimeter (cm) is a unit of length in the International System of Units (SI). 1 centimeter equals 0.01 meters. This value is exact by definition.
  • Meter (m) β€” The meter (m) is a unit of length in the International System of Units (SI). It is the reference unit for all length conversions on this site.
  • Kilometer (km) β€” The kilometer (km) is a unit of length in the International System of Units (SI). 1 kilometer equals 1,000 meters. This value is exact by definition.
  • Micrometer (Β΅m) β€” The micrometer (Β΅m) is a unit of length in the International System of Units (SI). 1 micrometer equals 0.000001 meters. This value is exact by definition.
  • Inch (in) β€” The inch (in) is a unit of length used in both the imperial and US customary systems. 1 inch equals 0.0254 meters. This value is exact by definition.
  • Yard (yd) β€” The yard (yd) is a unit of length used in both the imperial and US customary systems. 1 yard equals 0.9144 meters. This value is exact by definition.
  • Mile (mi) β€” The mile (mi) is a unit of length used in both the imperial and US customary systems. 1 mile equals 1,609.344 meters. This value is exact by definition.
  • Nautical Mile (nmi) β€” The nautical mile (nmi) is a unit of length. 1 nautical mile equals 1,852 meters. This value is exact by definition.

All 90 length conversions