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Length units converter
Length units converter - converts units between kilometers, meters, decimeters, angstroms, miles, feet, inches, american/imperial units, nautical (sea) units and astronomical units

What is "Length"?

The word "length" has several meanings (ex. the length of a word). We will focus on length in physical meaning in this article.

The definition of length:
LENGTH is the physical measure of distance between two points (according to measurements in the Euclidian space - so linear). The distance itself can be measured as a straight line, but also as a length of a curve.

The meaning of "length" could be equal to one of the following:
  • distance - most common: description of how far apart objects are. In strictly physical meaning - the length of way the object moves (possibly not the shortest way connecting two points)
  • displacement - the length of shortest possible way connecting two points
  • height - mostly in a vertical size of an object (like how "tall" it is)
  • altitude - when talking about how far in the air the object is (ex. how high is the airplane)
  • depth
  • width
  • size
Typically the symbol of length is L or l. Base unit is 1 meter. Length cannot be negative.

Length is measure of one dimension. However there is also area for 2 dimensions (length squared) and volume for 3 dimensions.

Units

The meter (also called metre) is the base unit of length in SI. It is defined as the distance travelled by light in vacuum during a time interval of 1/299.792.458 of a second. It has been defined on 17th General Conference on Weights and Measures in 1983.

After thousands of years of distance measurements, the thousands of units has been defined. The most known units we found are:
  • meter - and metric dependent units like kilometer, decimeter, centimeter, milimeter, micrometer, nanometer, angstrom etc. - the decimal multiples and submultiples of meter (so, thousands, milions... of meters) according to SI defined prefixes
  • mile, yard, foot, fathom, inch and less known league, furlong, chain, rod, link, hand, line - british (imperial) and american(US) units
  • parsec, astronomical unit - dedicated for astronomy
  • light year, light minute and light second - the distance travelled by light in vacuum during given unit of time (a year, minute, second etc.). These are really big lengths, so also used mainly for astronomical measurements.
  • sea league, sea mile, cabel (british or american) - are nautical (sea realated) units.

How to convert

  • Enter the number to field "value" - enter the NUMBER only, no other words, symbols or unit names. You can use dot (.) or comma (,) to enter fractions.
    Examples:
    • 1000000
    • 123,23
    • 999.99999
  • Find and select your starting unit in field "unit". Some unit calculators have huge number of different units to select from - it's just how complicated our world is...
  • And... you got the result in the table below. You'll find several results for many different units - we show you all results we know at once. Just find the one you're looking for.

Inputs data - value and unit, which we're going to convert

value
unit
decimals

1 (meter) is equal to:

metric

unitsymbolvalue
gigameter
Gm
1×10-9
megameter
Mm
0.000001
kilometer
km
0.001
meter
m
1
decimeter
dm
10
centimeter
cm
100
milimeter
mm
1000
micrometer(micron)
µm
1000000
nanometer
nm
1000000000
angstrom
Å
10000000000
nanometer
pm
1×1012
femtometer
fm
1×1015
attometer
am
1×1018

british-american

unitsymbolvalue
league
0.000207124
mile
mi
0.000621371
furlong
0.00497097
chain
0.049709695
rod
rd
0.198838782
fathom
fm
0.546806649
yard
yd
1.093613298
foot
ft
3.280839895
link
li
4.970969538
hand
13.440860215
inch
in
39.37007874
line
472.440944882

astronomical

unitsymbolvalue
parsec
pc
3.240755744×10-17
light year
ly
1.056970722×10-16
astronomical unit
au
6.684587154×10-12
light minute
5.559401735×10-11
light second
3.335640952×10-9

nautical

unitsymbolvalue
sea league
0.000179986
sea mile
nmi
0.000539957
cabel
0.005399568
british cabel
0.005396118
US cabel
0.004556722

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"Calculla v1" version of this calculatorIn December 2016 the Calculla website has been republished using new technologies and all calculators have been rewritten. Old version of the Calculla is still available through this link: v1.calculla.com. We left the version 1 of Calculla untouched for archvial purposes.
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