Template:Convert/list of units/area

Area
system	unit	code (alternative)	QID	symbol or abbrev.	notes	sample default conversion	combinations
SI	square kilometer	km2	Q712226	km2	US spelling: square kilometer	1.0 km2 (0.39 sq mi)	km2 sqmi
	square hectometer	hm2	Q35852	hm2	US spelling: square hectometer	1.0 hm2 (2.5 acres)
	square decameter	dam2	Q23931040	dam2	US spelling: square dekameter	1.0 dam2 (1,100 sq ft)
	square meter	m2	Q25343	m2	US spelling: square meter	1.0 m2 (11 sq ft)	m2 sqft
	square decimeter	dm2	Q3331719	dm2	US spelling: square decimeter	1.0 dm2 (16 sq in)
	square centimeter	cm2	Q2489298	cm2	US spelling: square centimeter	1.0 cm2 (0.16 sq in)	cm2 sqin
	square millimeter	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	square nautical mile	sqnmi (nmi2)	Q23931103	sq nmi		1.0 sq nmi (3.4 km2; 1.3 sq mi)
Middle Eastern	dunam	dunam (metric dunam)	Q23931109	(none)	The spellings dunum, donum and dönüm are also acceptable variants. Just replace dunam with the desired spelling in the code. The spelling dönüm also results from using donum diaeresis or donum dots.	1.0 dunam (0.0010 km2; 0.00039 sq mi)
Japanese	tsubo	tsubo	Q23931147	(none)		1.0 tsubo (3.3 m2)
Korean	pyeong	pyeong	Q706688	(none)		1.0 pyeong (3.3 m2)
Spanish	cuerda	cda	Q23931245	cda		1.0 cda (0.39 ha; 0.97 acres)