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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 an area equal to the area of a square of one statute mile.[2] 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.

One square mile is equivalent to:

  • 4,014,489,600 square inches[3]
  • 27,878,400 square feet[3]
  • 3,097,600 square yards[3]
  • 640 acres[1]
  • 258.9988110336 hectares
  • 2560 roods[4]
  • 25,899,881,103.36 square centimetres
  • 2,589,988.110336 square metres
  • 2.589988110336 square kilometres

When applied to a portion of the earth's surface, which is curved rather than flat, "square mile" is an informal synonym for section.

References[]

  1. ^ a b 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.
  2. ^ Davies, Charles (1872). Mathematical dictionary and cyclopedia of mathematical science. Original from Harvard University: A.S. Barnes and co. p. 582. http://books.google.com/books?id=DoUMAAAAYAAJ. 
  3. ^ a b c François Cardarelli (2003). Encyclopaedia of scientific units, weights, and measures: their SI equivalences and origins. Springer. p. 3. ISBN 978-1-85233-682-0. http://books.google.com/books?id=GV1aV7V7I00C&pg=SA3-PA39. Retrieved 22 February 2012. 
  4. ^ Zupko, Ronald Edward (1985). A dictionary of weights and measures for the British Isles: the Middle Ages to the twentieth century. American Philosophical Society. p. 353. ISBN 978-0-87169-168-2. http://books.google.com/books?id=0l_k-XMIiQIC&pg=PA353. Retrieved 22 February 2012. 


This page uses content from the English language Wikipedia. The original content was at Square mile. The list of authors can be seen in the page history. As with this Familypedia wiki, the content of Wikipedia is available under the Creative Commons License.
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