"Mile square" redirects here. For other uses, see Mile square (disambiguation) and Square mile (disambiguation).
Unit of area
square mile
Various units of area, with square mile being represented as a yellow square
General information
Unit system
Imperial, United States customary units
Unit of
area
Symbol
mi2, sq mi
Conversions
1 mi2in ...
... is equal to ...
Imperial/US
4.0145×109 sq in
2.7878×107 sq ft
3.0976×106 sq yd
640 acres
SI units
2.59×106 m2
2.59 km2
The square mile (abbreviated as sq mi and sometimes as mi2)[1] is an imperial and US unit of measure for area. One square mile is equal to the area of a square with each side measuring a length of one mile.[2]
^Rowlett, Russ (September 1, 2004). "S", How Many? A Dictionary of Units of Measurement. University of North Carolina at Chapel Hill. Retrieved February 22, 2012.
^Davies, Charles (1872). Mathematical dictionary and cyclopedia of mathematical science. Original from Harvard University: A.S. Barnes and co. p. 582.
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