Template:Convert/list of units/length

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Length
system unit code
(alternative)
abbreviation notes conversion factor/m combinations
SI gigameter Gm Gm UK spelling: gigametre
1,000,000,000
megameter Mm Mm UK spelling: megametre
1,000,000
kilometer km km UK spelling: kilometre
1,000
  • km mi
hectometer hm hm UK spelling: hectometre
100
dekameter dam dam UK spelling: dekametre
10
meter m m UK spelling: metre
1
  • m ft (m foot)
decimeter dm dm UK spelling: decimetre
0.1
centimeter cm cm UK spelling: centimetre
0.01
  • cm in
millimeter mm mm UK spelling: millimetre
0.001
  • mm in
micrometer μm
(um, micrometer, micrometre)
µm UK spelling: micrometre
0.000001


nanometer nm nm UK spelling: nanometre
0.000000001
non-SI metric ångström Å
(angstrom)
Å 0.0000000001
Imperial
&
US customary
mile mi mi 1,609.344
  • mi km
furlong furlong 201.168
chain chain 20.1168
rod rd rd 5.0292
pole pole equivalent to a rod 5.0292
perch perch equivalent to a rod 5.0292
fathom fathom assumes 1 fathom ≡ 6 ft 1.8288
yard yd yd assumes the international definition 0.9144
  • yd m
foot ft (foot) ft Code "foot" will show "foot" if plural. 0.3048
  • ftin (feet and inches)
  • ft m (foot m)


inch in in 0.0254
  • in cm
  • in mm
Maritime units nautical mile nmi nmi the international standard nautical mile 1,852
nautical mile oldUKnmi
(admiralty nmi)
nmi 6080 ft
the pre-1970 British nautical mile
1,853.184
Brnmi (Brit) nmi
admi nmi (admiralty)
nautical mile oldUSnmi nmi 6080.2 ft
the pre-1954 US nautical mile
1,853.24496
pre1954USnmi
(pre1954usnmi)
(pre-1954 US) nmi
Other gigaparsec Gpc Gpc 3.0856775813057×10^25
megaparsec Mpc Mpc 3.0856775814672×10^22
kiloparsec kpc kpc 3.0856775814672×10^19
parsec pc (parsec) pc 3.0856775814672×10^16
gigalight-year Gly Gly 9.4607304725808×10^24
megalight-year Mly Mly 9.4607304725808×10^21
kilolight-year kly kly 9.4607306353356×10^18
light-year ly ly 9.4607306353356×10^15
astronomical unit AU AU 149,597,870,700