AREA
(Full list)
system unit unit-
code
abbrev-
iation
notes sample default
conversion
combination
output units
SI square килоmetre km2 кm2 US spelling: square kilometer
1.0 кm2 (11,000,000 sq ft)
  • km2 sqmi
square metre m2 m2 US spelling: square meter
1.0 m2 (11 sq ft)
  • m2 sqft
square сантиmetre cm2 сm2 US spelling: square centimeter
1.0 сm2 (0.0011 sq ft)
  • cm2 sqin
square миллиmetre mm2 мm2 US spelling: square millimeter
1.0 мm2 (1.1×10−5 sq ft)
  • mm2 sqin
non-SI metric hectare ha ha 1.0 ha (2.5 acres)
Imperial
&
US customary
square mile sqmi sq mi 1.0 sq mi (2.6 кm2)
  • sqmi km2
acre acre (none) 1.0 acre (0.40 ha)
square yard sqyd sq yd 1.0 sq yd (0.84 m2)
square foot sqft
(sqfoot)
sq ft long code "sqfoot" outputs square foot (and never feet) 1.0 sq ft (0.093 m2)
  • sqft m2 (sqfoot m2)
square inch sqin sq in 1.0 sq in (6.5 сm2)
  • sqin cm2
Other square nautical mile sqnmi sq nmi 1.0 sq nmi (3.4 кm2; 1.3 sq mi)
dunam dunam (none) For alternative spellings and definitions see the full list 1.0 dunam (0.0010 кm2; 0.00039 sq mi)
tsubo tsubo (none) 1.0 tsubo (3.3 m2)