Length Unit Converter

To perform conversion between various length units, start by selecting the original unit using the “From:” drop-down list and the target unit from the “To:” drop-down list. Then enter the original value into the input field on the left. The tool will instantly display the converted value at the top of the page.  

This converter supports the following length and distance units of measure:

Angstrom (Å):

A unit of length used to measure atomic dimensions.

1 Å = 1 x 10^-10 meters.

Astronomical unit (ua):

The average distance from the Earth to the Sun.

1 ua =  149.5979 million kilometers.

Caliber (cal):

Typically used to measure the internal diameter of a gun barrel. In the United States it is expressed in hundredths of an inch; in the United Kingdom in thousandths; and elsewhere in millimeters.

Centimeter (cm):

A metric unit of length.

1 cm = 0.01 meters.

Decimeter (dm):

A metric unit of length equal to 0.1 meters.

1 dm = 0.1 meters.

Fathom:

A unit of length equal to six feet.

1 fathom = 1.8288 meters.

Fermi:

A unit of length used in particle physics.

1 Fermi = 1 x 10^-15 meters.

Foot (ft):

An imperial and U.S. customary unit of length.

1 ft = 0.3048 meters.

Furlong (fur):

A unit of length used in horse racing and agriculture, equal to 660 feet or 40 rods.

1 furlong = 201.168 meters.

Inch (in):

An imperial and U.S. customary unit of length.

1 in = 0.0254 meters.

Kilometer (km):

 A metric unit of length.

1 km = 1000 meters.

League:

An old unit of length equal to 3 miles.

1 league is 4.828032 kilometers

Light year (l.y.):

The distance light travels in one year.

1 light year =  9.46073  x 10^15 meters.

Meter (m):

The base unit of length in the International System of Units (SI).

Micrometer (μm):

A metric unit of length.

1 μm = 1 x 10^-6 meters.

Mil (0.001 in):

A unit of length equal to one thousandth of an inch.

1 mil = 0.0254 mm.

Mile (mi):

An imperial and U.S. customary unit of length.

1 mi = 1609.344 meters.

Mile nautical:

A unit of length used in navigation.

1 nautical mile = 1852 meters.

Mile nautical (UK):

Similar to the nautical mile but used in the United Kingdom.

1 UK nautical mile = 1853.184 meters.

Millimeter (mm):

A metric unit of length.

1 mm = 0.001 meters.

Nanometer (nm):

A metric unit of length.

1 nm = 1 x 10^-9 meters.

Parsec (pc):

A unit of astronomical distance.

1 parsec = 3.085678 x 10^16 meters.

Pica (computer):

A unit of length used in typography for measuring font size.

1 computer pica = 1/6 inch ≈ 4.233333 millimeters.

Pica (print):

A unit of length used in typography for measuring font size.

1 print pica = 4.217518 millimeters.

Picometer (pm):

A metric unit of length.

1 pm = 1 x 10^-12 meters.

Point (computer):

A unit of length used in typography for measuring font size.

1 computer point = 1/72 inch ≈ 0.3527778 millimeters.

Point (print):

A unit of length used in typography for measuring font size.

1 print point = 0.3514598 millimeters.

Rod / perch / pole (rd):

An imperial unit of length.

1 rod = 5.0292 meters.

Yard (yd):

An imperial and U.S. customary unit of length.

1 yd = 0.9144 meters.

Note: the fathom, furlong, league, rod, pole, and perch units in this calculator are defined using the international foot (1 foot = 0.3048 meter exactly).