The square mile (sometimes written as mi²) 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

• 260 hectares

• 2560 roods

• 25,899,881,103.36 square centimetres

• 2,589,988.110336 square metres

• 2.589988110336 square kilometres