Square mile
Unit of area
From Wikipedia, the free encyclopedia
The square mile (abbreviated as sq mi and sometimes as mi2)[2] 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.[3]
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| square mile | |
|---|---|
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| 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 |
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| SI units |
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Equivalents
One square mile is equal to:
- about four billion square inches[4]
- nearly 27.9 million square feet
- nearly 3.1 million square yards
- 2,560 roods
- 640 acres
One square mile is also equivalent to:
- nearly 2.59 million square meters
- nearly 25.9 billion square centimeters
- nearly 2.59 trillion square millimeters
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 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
In the United States Public Land Survey System, "square mile" is an informal synonym for section.