(Redirected from Square miles)

The **square mile** (abbreviated as **sq mi** and sometimes as **mi2**)[1] is an imperial and US unit of measure for area. One square mile is an area equal to the area of a square with sides of length one mile.[2]

One square mile is equal to:

- 4,014,489,600 square inches[3]
- 27,878,400 square feet
- 3,097,600 square yards
- 2,560 roods
- 640 acres

One square mile is also equivalent to:

- 2,589,988.1103360 square metres
- 258.99881103360 hectares
- 2.5899881103360 square kilometres

Square miles should not be confused with miles square, a square region with each side having a length of the value given. For example, a region which is 20 miles square (20 mi × 20 mi) has an area of 400 sq mi; a rectangle of measuring 10 mi × 40 mi also has an area of 400 sq mi, but is not 20 miles square.

In the United States Public Land Survey System, "square mile" is an informal synonym for section.