Template:Convert/list of units/area

system unit code
abbreviation notes conversion factor/m2 combinations
SI square kilometer km2 km2 UK spelling: square kilometre
  • km2 sqmi
square hectometer hm2 hm² UK spelling: square hectometre
square dekameter dam2 dam² UK spelling: square dekametre
square meter m2 m2 UK spelling: square metre
  • m2 sqft
square decimeter dm2 dm2 UK spelling: square decimetre
square centimeter cm2 cm2 UK spelling: square centimetre
  • cm2 sqin
square millimeter mm2 mm² UK spelling: square millimetre
  • mm2 sqin
non-SI metric hectare ha ha equivalent to one square hectometer 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 Code "sqfoot (foot2)" will show "square foot" if plural. 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)
Korean pyeong pyeong (400/121)