Template:Convert/list of units/area

Area
system	unit	code (alternative)	QID	symbol or abbrev.	notes	sample default conversion	combinations
SI	square kilometre	km2	Q712226	km2	US spelling: square kilometer	1.0 km2 (0.39 sq mi)	km2 sqmi
	square hectometre	hm2	Q35852	hm2	US spelling: square hectometer	1.0 hm2 (2.5 acres)
	square decametre	dam2	Q23931040	dam2	US spelling: square dekameter	1.0 dam2 (1,100 sq ft)
	square metre	m2	Q25343	m2	US spelling: square meter	1.0 m2 (11 sq ft)	m2 sqft
	square decimetre	dm2	Q3331719	dm2	US spelling: square decimeter	1.0 dm2 (16 sq in)
	square centimetre	cm2	Q2489298	cm2	US spelling: square centimeter	1.0 cm2 (0.16 sq in)	cm2 sqin
	square millimetre	mm2	Q2737347	mm2	US spelling: square millimeter	1.0 mm2 (0.0016 sq in)	mm2 sqin
non-SI metric	hectare	ha	Q35852	ha	equivalent to one square hectometre	1.0 ha (2.5 acres)
Imperial & US customary	square mile	sqmi	Q232291	sq mi		1.0 sq mi (2.6 km2)	sqmi km2
	acre	acre	Q81292	(none)		1.0 acre (0.40 ha)
	square yard	sqyd	Q1550511	sq yd		1.0 sq yd (0.84 m2)
	square foot	sqft (ft2, sqfoot, foot2)	Q857027	sq ft	long code "sqfoot (foot2)" outputs square foot (and never feet)	1.0 sq ft (0.093 m2)	sqft m2
	square inch	sqin	Q1063786	sq in		1.0 sq in (6.5 cm2)	sqin cm2 sqin mm2
Maritime units
Middle Eastern
Japanese
Korean
Spanish	cuerda	cda	Q23931245	cda		1.0 cda (0.39 ha; 0.97 acres)