# Square mile conversions

The square mile conversion selector on this page 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

Square mile conversions: a detailed list with conversions from square miles to other (metric, imperial, or customary) area and surface measurement units is displayed below.

- square mile to acre (sq mi to ac)
- square mile to acre (US survey) (sq mi to ac)
- square mile to are (sq mi to a)
- square mile to carreau
- square mile to centiare (sq mi to ca)
- square mile to circular inch (sq mi to circ in)
- square mile to circular mil (sq mi to cmil)
- square mile to decare (sq mi to daa)
- square mile to dunam
- square mile to hectare (sq mi to ha)
- square mile to mu
- square mile to ping
- square mile to pyong
- square mile to rood (sq mi to ro)
- square mile to section
- square mile to square centimeter (sq mi to sq cm)
- square mile to square chain (sq mi to sq ch)
- square mile to square decameter (sq mi to sq dam)
- square mile to square decimeter (sq mi to sq dm)
- square mile to square foot (sq mi to sq ft)
- square mile to square hectometer (sq mi to sq hm)
- square mile to square inch (sq mi to sq in)
- square mile to square kilometer (sq mi to sq km)
- square mile to square meter (sq mi to sq m)
- square mile to square micrometer (sq mi to sq μm)
- square mile to square mil (sq mi to sq mil)
- square mile to square millimeter (sq mi to sq mm)
- square mile to square nanometer (sq mi to sq nm)
- square mile to square yard (sq mi to sq yd)
- square mile to stremma