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List Units: A B C D E-F G H-I J-L M N O-P Q-R S T U-Z
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Area
Unit Name Symbol SI Equivalent 
· acre 
ac, acre  4046.86 m2 
· are 
a  100 m2 
· barn 
b  1x10-28 m2 
· barrel (US, liq.) per foot 
bbl (US, liq.)/ft  0.391209 m2 
· barrel (US, liq.) per inch 
bbl (US, liq.)/in  4.69451 m2 
· barrel (US, petrol) per foot 
bbl (US, petrol)/ft  0.521612 m2 
· barrel (US, petrol) per inch 
bbl (US, petrol)/in  6.25934 m2 
· centare 
  1 m2 
· circular inch 
cin  5.06707x10-4 m2 
· circular mil 
cmil  5.06707x10-10 m2 
· hectare 
ha  1x104 m2 
· morgen (Dutch) 
  8244.35 m2 
· morgen (Prussian) 
  2532.24 m2 
· morgen (South Africa) 
  8565.3 m2 
· quarter section 
  6.47497x105 m2 
· rood (UK) 
  1011.71 m2 
· section (square statute mile) 
sq.mi, mi2 (stat.)  2.58999x106 m2 
· shed 
  1x10-52 m2 
· square centimeter 
cm2  10x10-5 m2 
· square chain (engineer's) 
sq. ch. (engineer's)  929.03 m2 
· square chain (Gunter's) 
sq. ch. (Gunter's)  404.686 m2 
· square decameter 
dam2  100 m2 
· square decimeter 
dm2  10x10-3 m2 
· square exameter 
Em2  10x1035 m2 
· square femtometer 
fm2  1x10-30 m2 
· square fermi 
f2  1x10-30 m2 
· square foot 
ft2  9.2903x10-2 m2 
· square gigameter 
Gm2  10x1017 m2 
· square hectometer 
hm2  1x104 m2 
· square inch 
in2, sq. in  6.4516x10-4 m2 
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List Units: A B C D E-F G H-I J-L M N O-P Q-R S T U-Z
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