Square mile

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The square mile (sometimes written as mi²) is an imperial and US unit of measure for an area equal to the area of a square of one statute mile. It should not be confused with miles square, which refers to the number of miles on each side squared. For instance, 20 miles square (20×20 miles) is equal to 400 square miles.

1 square mile	= 640 acres
	= 27,878,400 square feet
	= 2.589988110336 square kilometres (exactly)
	≈ 260 hectares

[edit] Conversions

1 square mile is equivalent to:

• 4,014,489,600 square inches
• 27,878,400 square feet
• 3,097,600 square yards
• 640 acres
• 2560 roods
• 25,899,881,103.36 square centimetres
• 2,589,988.110336 square metres
• 2.589988110336 square kilometres

[edit] North American land surveys

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In the Public Land Survey System of the U.S. and the Dominion Land Survey of Canada, the size of a standard section of land is one square mile, but always with the marginally larger survey definition.

[edit] References

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