Area
system unit code
(alternative)
abbreviation notes conversion factor/m2 combinations
SI مربع کلومیٹre km2 کلومیٹر2 US spelling: square kilometer
1,000,000
  • km2 sqmi
square hectometre hm2 hm² US spelling: square hectometer
10,000
square decametre dam2 dam² US spelling: square dekameter
100
مربع میٹرre m2 میٹر2 US spelling: square meter
1
  • m2 sqft
square decimetre dm2 dm2 US spelling: square decimeter
0.01
square centimetre cm2 cm2 US spelling: square centimeter
0.0001
  • cm2 sqin
square millimetre mm2 mm² US spelling: square millimeter
0.000001
  • mm2 sqin
non-SI metric hectare ha ha equivalent to one square hectometre 10,000
Imperial
&
US customary


مربع میل sqmi مربع میل 2,589,988.110336
  • sqmi km2
ایکڑ acre 4,046.856422
مربع گز sqyd مربع گز 0.83612736


square فٹ sqft
(ft2, sqfoot, foot2)
مربع فٹ The sqfoot (foot2) code will produce square foot as the plural form. 0.09290304
  • sqft m2



مربع انچ sqin مربع انچ 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)