Template:Convert/list of units/length

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		9.4607304725808×10^18
	light-year	ly	ly		9.4607304725808×10^15
	astronomical unit	AU	AU		149,597,870,700