# Length

Length is a physical quantity, most commonly referred as the longest dimension of the object, which is the distance between its two most distant points, measured in horizontal extent, as opposed to height, measured in vertical extent, as well as the width or thickness, measured across the object at right angles to the length.

Among other spatial variables length is the value of a single dimension, whereas area - two-dimensional, volume - three-dimensional.

In physical science and engineering term "length" is used as a synonym for "distance" and is denoted by L or l.

In most systems length is one of the fundamental unit which forms basis for other units. In the International System of Units (SI), basic unit of length is meter.Read more

Convert   unit(s)

### Metric

Exametre Em 1 0.001
Petametre Pm 1000 1
Terametre Tm 1000000 1000
Gigametre Gm 1000000000 1000000
Megametre Mm 10000000000×102 1000000000
Kilometre km 10000000000×105 10000000000×102
Hectometre hm 10000000000×106 10000000000×103
Decametre dam 10000000000×107 10000000000×104
Metre m 10000000000×108 10000000000×105
Decimetre dm 10000000000×109 10000000000×106
Centimetre cm 10000000000×1010 10000000000×107
Millimetre mm 10000000000×1011 10000000000×108
Micrometre μm 10000000000×1014 10000000000×1011
Nanometre nm 10000000000×1017 10000000000×1014
Angstrom Å 10000000000×1018 10000000000×1015
Picometre pm 10000000000×1020 10000000000×1017
Femtometre fm 10000000000×1023 10000000000×1020
Attometre am 10000000000×1026 10000000000×1023
Scandinavian mile 10000000000×104 10000000000×101
Nautical mile nmi 5399568035×105 5399568035×102

### British/American

Nautical mile (US) 5395931899×105 5395931899×102
Nautical mile (UK) 5396118248×105 5396118248×102
Mile (US survey) 6213700339×105 6213700339×102
Mil 3937007874×1013 3937007874×1010
Thou th 3937007874×1013 3937007874×1010
Inch " 3937007874×1010 3937007874×107
Foot ' 3280839895×109 3280839895×106
Yard yd 1093613298×109 1093613298×106
Chain ch 4970969538×107 4970969538×104
Furlong fur 4970969538×106 4970969538×103
Mile mi 6213711922×105 6213711922×102
Rod rd 1988387815×108 1988387815×105
Hand h 9842519685×109 9842519685×106
Nail 5249343832×1010 5249343832×107

### Astronomical

Astronomical unit AU 6684587.1223 6684.5871
Light year ly 105.7001 0.1057
Parsec pc 32.4078 0.0324
Kiloparsec kpc 0.0324 3.2408×10-5
Megaparsec Mpc 3.2408×10-5 3.2408×10-8
Gigaparsec Gpc 3.2408×10-8 3.2408×10-11

### Old Russian

Tochka 3937007874×1012 3937007874×109
Linia 3937007874×1011 3937007874×108
Diuym 3937007874×1010 3937007874×107
Vershok 2249718785×1010 2249718785×107
Milia 1339118324×105 1339118324×102