This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unverifiable material may be challenged and removed. (August 2006)

The square mile 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.

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 centimeters
• 2,589,988.110336 square meters
• 2.589988110336 square kilometers

This section may be confusing or unclear. Please help clarify the article. Suggestions may be on the talk page.

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.