For other uses, see Square mile (disambiguation).
The square mile (abbreviated as sq mi and sometimes as mi²) is an imperial and US unit of measure for an area equal to the area of a square of one statute mile.1 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 27,878,400 square feet 3,097,600 square yards 640 acres 258.9988110336 hectares 2560 roods 25,899,881,103.36 square centimetres 2,589,988.110336 square metres 2.589988110336 square kilometres References ^ 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. This article relies largely or entirely upon a single source. Please help improve this article by introducing appropriate citations of additional sources. (August 2009)
