| 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) |
|
| 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) |
| |
| 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) |
| |
| square millimetre | mm2 | Q2737347 | mm2 | US spelling: square millimeter |
1.0 mm2 (0.0016 sq in) |
| |
| 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) |
| |
| 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) |
| |
| square inch | sqin | Q1063786 | sq in | 1.0 sq in (6.5 cm2) |
| ||
| 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 diaeresisordonum 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) | ||