| 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 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) | ||