Template:Convert/list of units/area

Area
system	unit	code (alternative)	abbreviation	notes	conversion factor/m2	combinations
SI	square kilometre	km2	km2	US spelling: square kilometer	1,000,000	km2 sqmi
	square hectometre	hm2	hm²	US spelling: square hectometer	10,000
	square decametre	dam2	dam²	US spelling: square dekameter	100
	square metre	m2	m2	US spelling: square meter	1	m2 sqft
	square decimetre	dm2	dm2	US spelling: square decimeter	0.01
	square centimetre	cm2	cm2	US spelling: square centimeter	0.0001	cm2 sqin
	square millimetre	mm2	mm²	US spelling: square millimeter	0.000001	mm2 sqin
non-SI metric	hectare	ha	ha	equivalent to one square hectometre	10,000
Imperial & US customary	square mile	sqmi	sq mi		2,589,988.110336	sqmi km2
	acre	acre			4,046.856422
	square yard	sqyd	sq yd		0.83612736
	square foot	sqft (ft2, sqfoot, foot2)	sq ft	Code "sqfoot (foot2)" will show "square foot" if plural.	0.09290304	sqft m2
	square inch	sqin	sq in		0.00064516	sqin cm2 sqin mm2
Maritime units	square nautical mile	sqnmi (nmi2)	sq nmi		3,429,904
Middle Eastern	dunam	dunam(metric dunam)		The spellings dunum, donum and dönüm are also acceptable variants. Just replace dunam with the desired spelling in the code. Note that the spelling dönüm is also it is also possible using donum diaeresis or donum dots.	1,000
		Cypriot dunam			1337.803776
		Iraqi dunam			2500
		old dunam			919.3
Japanese	tsubo	tsubo			(400/121)
Korean	pyeong	pyeong			(400/121)