# Square mile conversions

The square mile conversion selector here selects the area/surface measurement unit to convert to starting from square miles (sq mi). To make a conversion starting from a unit of area other than square mile, simply click on the "Reset" button.

## About square mile

The **square mile** is a unit of area in the Imperial and US customary systems of units equal to 2,589,988.11 square meters (1 sq mi = 2,589,988.11 m^{2}), the standard derived unit of area in the International System of Units (SI).

The square mile (sq mi) is also equal to 258.998811 hectares (ha) (a unit of area in the metric system), or 2.58998811 × 10^{10} square centimeters (cm^{2}) or 2.58998811 square kilometers (km^{2}) (units of area in the SI), or 2,560 roods (an Imperial unit of area), or 640 acres (ac), or 27,878,400 square feet (sq ft) or 3,097,600 square yards (sq yd), which are Imperial / US customary units of area.

The square mile (sq mi) is an Imperial / US customary unit of area. The mile (mi) is a unit of length in the Imperial and US customary systems of units. An area of 1.0 square mile is the area of a square that is 1.0 mile on each side.

Symbol: sq mi

Plural: square miles