Square mile

square mile
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	4.0145×109sq in; 2.7878×107sq ft; 3.0976×106sq yd; 640 acres;
SI units	2.59×106m2; 2.59 km2;

Thesquare mile(abbreviated assq miand sometimes asmi²)^[1]is animperialandUS unitof measure forarea.One square mile is equal to the area of asquarewith each side measuring a length of onemile.^[2]

Equivalents

One square mile is equal to:

4,014,489,600square inches^[3]
27,878,400square feet
3,097,600square yards
2,560roods
640acres

One square mile is also equivalent to:

2,589,988.1103360square metres
258.99881103360hectares
2.5899881103360square kilometres

Similarly named units

Miles square

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 mi×20 mi) has an area of400 sq mi;a rectangle of measuring10 mi×40 mialso has an area of400 sq mi,but is not 20 miles square.

Section

In the United StatesPublic Land Survey System,"square mile" is an informal synonym forsection.

References

^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.Retrieved22 February2012.

Formula Conversion, Square miles to numerous area units with algebraic steps and unit cancellation shown

[RussRowlett-1] 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-2] Davies, Charles (1872).Mathematical dictionary and cyclopedia of mathematical science.Original from Harvard University: A.S. Barnes and co. p.582.

[Cardarelli20032-3] François Cardarelli (2003).Encyclopaedia of scientific units, weights, and measures: their SI equivalences and origins.Springer. p.3.ISBN 978-1-85233-682-0.Retrieved22 February2012.

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