Template:Convert/list of units/length

Length
system	unit	code (alternative)	abbreviation	notes	conversion factor/m	combinations
SI	gigametre	Gm	Gm	US spelling: gigameter	1,000,000,000
	megametre	Mm	Mm	US spelling: megameter	1,000,000
	kilometre	km	km	US spelling: kilometer	1,000	km mi
	hectometre	hm	hm	US spelling: hectometer	100
	decametre	dam	dam	US spelling: dekameter	10
	metre	m	m	US spelling: meter	1	m ft (m foot)
	decimetre	dm	dm	US spelling: decimeter	0.1
	centimetre	cm	cm	US spelling: centimeter	0.01	cm in
	millimetre	mm	mm	US spelling: millimeter	0.001	mm in
	micrometre	μm (um, micrometre)	µm	US spelling: micrometer	0.000001
	nanometre	nm	nm	US spelling: nanometer	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
	foot	ft (foot)	ft	The foot code will produce foot as the plural form.	0.3048	ft m (foot m)
	hand	hand	h		0.1016
	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
		pre1954U.S.nmi (pre1954usnmi)	(pre-1954 U.S.) nmi
Other	gigaparsec	Gpc	Gpc		3.0856775813057×10^25
	megaparsec	Mpc	Mpc		3.0856775813057×10^22
	kiloparsec	kpc	kpc		3.0856775813057×10^19
	parsec	pc (parsec)	pc		3.0856775813057×10^16
	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		149,597,870,691