Length / Distance Converter

Please enter one length to calculate the rest:

Millimeters:       mm

Centimeters:       cm

Meters / metres:  m

Kilometers:         km

Inches:                in

Feet:                   ft

Yards:                 yd

Miles:                 mi

Nautical Miles: nmi

Note: there is variance in the spelling of  Meter (UK) and Metre (US).

Meters are the SI unit for length, 1 meter is defined by the length  that light travels in 1/299792458 seconds.

1 millimeter is 1/1000th of a meter.

1 centimeter is 1/100th of a meter.

1 kilometer is 1000 meters.

1 inch is 25.4 millimeters.

1 foot is 12 inches.

1 yard is 3 feet.

1 mile is 1610 meters.

1 nautical mile is 1852 meters.

Some other interesting length units are defined as follows:

1 fathom is 1.8288 meters.

1 furlong is 201.168 meters.

1 parsec is 3.086e+16 meters.

1 astronomical unit is 1.496e+11

1 span is the maximum distance between thumb and little finger, this varies person to person.

1 nanometer is 1e-9 meters

1 picometer is 1e-12

1 micrometer is 1e-6 meters