"Mile square" redirects here. For other uses, see Mile square (disambiguation) and Square mile (disambiguation). Unit of area
square mile
An aerial photograph of farmland in Indiana, with each small square being one square mile. (see Section (United States land surveying))
General information
Unit system
Imperial, United States customary units
Unit of
area
Symbol
mi2, sq mi
Conversions
1 mi2 in ...
... is equal to ...
Imperial/US
4.0145×109 sq in
2.7878×107 ft2
3.0976×106 yd2
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]
Equivalents
[edit]Various units of area, with square mile being represented as a yellow square
One square mile is equal to:
4,014,489,600 square inches[3]
27,878,400 square feet
3,097,600 square yards
2,560 roods
640 acres
One square mile is also equivalent to:
2,589,988.1103360 square metres
258.99881103360 hectares
2.5899881103360 square kilometres
Similarly named units
[edit]
Miles square
[edit]
Square miles should not be confused with miles square, a square region with each side having a length of the value given. For example, a region which is 20 miles square (20 miles × 20 miles) has an area of 400 mi2; a rectangle of measuring 10 miles × 40 miles also has an area of 400 mi2, but is not 20 miles square.
Section
[edit]
In the United States Public Land Survey System, "square mile" is an informal synonym for section.
References
[edit]
^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.
^François Cardarelli (2003). Encyclopaedia of scientific units, weights, and measures: their SI equivalences and origins. Springer. p. 3. ISBN 978-1-85233-682-0. Retrieved 22 February 2012.
Formula Conversion, Square miles to numerous area units with algebraic steps and unit cancellation shown
An aerial photograph of farmland in Indiana, with each small square being one square mile. (see Section (United States land surveying))