Full name: square mile
Plural form: square miles
Alternate spelling: sq mi
Category type: area
Scale factor: 2589988.11034
The SI derived unit for area is the square meter.
1 square meter is equal to 3.86102158542E-7 square mile.
Valid units must be of the area type.
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A square mile is defined as the area of a square with sides one mile in length.
The definition of a mile is as follows:
A mile is any of several units of distance, or, in physics terminology, of length. Today, one mile is mainly equal to about 1609 m on land and 1852 m at sea and in the air, but see below for the details. The abbreviation for mile is 'mi'. There are more specific definitions of 'mile' such as the metric mile, statute mile, nautical mile, and survey mile. On this site, we assume that if you only specify 'mile' you want the statute mile.