Square mile
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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]
One square mile is equal to:
- about four billion square inches[3]
- 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
[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 mi × 20 mi) has an area of 400 sq mi; a rectangle of measuring 10 mi × 40 mi also has an area of 400 sq mi, 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.
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