Length


In the physical sciences and engineering, when one speaks of “units of length”, the word “length” is synonymous with “distance”. There are several units that are used to measure length. Historically, units of length may have been derived from the lengths of human body parts, the distance travelled in a number of paces, the distance between landmarks or places on the Earth, or arbitrarily on the length of some fixed object.

Converter of Length Unit

Convert From
Rounded to
decimals 
Meter m
Micrometer µm
Millimeter mm
Centimeter cm
Decimeter dm
Dekameter dam
Hectometer hm
Kilometer km
Angstrom   Å
British & American Units of Length
Convert From  
Inch in
Foot ft
Yard yd
Rod or pole or perch rd
Chain ch
Furlong fur
Mile mi
Hand hands
Mil mil
Nautical (Sea) Units of Distance
Convert From  
Cable length cable
Fathom fath
Nautical league
Nautical mile nmi

In the International System of Units (SI), the basic unit of length is the metre and is now defined in terms of the speed of light. The centimetre and the kilometre, derived from the metre, are also commonly used units. In U.S. customary units, English or Imperial system of units, commonly used units of length are the inch, the foot, the yard, and the mile.

Units used to denote distances in the vastness of space, as in astronomy, are much longer than those typically used on Earth and include the astronomical unit, the light-year, and the parsec.

Units of Length & Distance: meter (m), millimeter (mm), centimeter (cm), decimeter(dm), dekameter(dam), hectometer(ha), kilometer (km), inch (in), foot (ft), yard (yd), mile, angstrom, chains, furlong, fathom, hand, league, light year, micron, mil (norway-sweden), nautical mile, rod.

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