Square Mile (mi2)
The square mile is a unit of area, used for city and county areas, wildlife reserves, and geographic comparisons. Its symbol is mi2.
mi2
ft2
1 square mile equals
| Square Feet | 27,878,400 ft2 |
| Square Meters | 2,589,990 m2 |
| Acres | 640 ac |
| Hectares | 258.999 ha |
About the square mile
The square mile has been used since at least the 16th century for land measurement. In the US, a "section" of land is defined as exactly one square mile (640 acres).
In everyday use the square mile appears in city and county areas, wildlife reserves, and geographic comparisons. As a point of reference: the City of London (the historic core) covers about 1.12 square miles.