Template:Convert/list of units/area

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system unit code
abbreviation notes conversion factor/m² combinations
SI square kilometre km2 km2 US spelling: square kilometer
  • km2 sqmi
square hectometre hm2 hm² US spelling: square hectometer
square decametre dam2 dam² US spelling: square dekameter
square metre m2 m2 US spelling: square meter
  • m2 sqft
square decimetre dm2 dm² US spelling: square decimeter
square centimetre cm2 cm² US spelling: square centimeter
  • cm2 sqin
square millimetre mm2 mm² US spelling: square millimeter
  • mm2 sqin
non-SI metric hectare ha ha equivalent to one square hectometre 10,000
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 The sqfoot (foot2) code will produce square foot as the plural form. 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)