# Convert Square Miles to Acres

Enter the area in square miles below to get the value converted to acres.

**Results in Acres:**

## How to Convert Square Miles to Acres

To convert a square mile measurement to an acre measurement, multiply the area by the conversion ratio. One square mile is equal to 640 acres, so use this simple formula to convert:

The area in acres is equal to the square miles multiplied by 640.

**For example,**here's how to convert 5 square miles to acres using the formula above.

Square miles and acres are both units used to measure area. Keep reading to learn more about each unit of measure.

## Square Miles

One square mile is equal to the area of a square with sides that are 1 mile long. One square mile is roughly equal to 2.59 square kilometers.

The square mile is a US customary and imperial unit of area. Square miles can be abbreviated as *sq mi*, and are also sometimes abbreviated as *mi²*. For example, 1 square mile can be written as 1 sq mi or 1 mi².

## Acres

One acre is defined as the area equal to a space that is one chain (66 ft) by one furlong (660 ft), or 10 square chains. That's equal to 43,560 square feet for those unfamiliar with those units of measure.

The acre is a US customary and imperial unit of area. Acres can be abbreviated as *ac*, for example 1 acre can be written as 1 ac.

Try our acreage calculator to find the area of a plot of land in acres by locating the boundaries on a map.

## Square Mile Measurements and Equivalent Acre Conversions

Square Miles | Acres |
---|---|

1 sq mi | 640 ac |

2 sq mi | 1,280 ac |

3 sq mi | 1,920 ac |

4 sq mi | 2,560 ac |

5 sq mi | 3,200 ac |

6 sq mi | 3,840 ac |

7 sq mi | 4,480 ac |

8 sq mi | 5,120 ac |

9 sq mi | 5,760 ac |

10 sq mi | 6,400 ac |

11 sq mi | 7,040 ac |

12 sq mi | 7,680 ac |

13 sq mi | 8,320 ac |

14 sq mi | 8,960 ac |

15 sq mi | 9,600 ac |

16 sq mi | 10,240 ac |

17 sq mi | 10,880 ac |

18 sq mi | 11,520 ac |

19 sq mi | 12,160 ac |

20 sq mi | 12,800 ac |

21 sq mi | 13,440 ac |

22 sq mi | 14,080 ac |

23 sq mi | 14,720 ac |

24 sq mi | 15,360 ac |

25 sq mi | 16,000 ac |

26 sq mi | 16,640 ac |

27 sq mi | 17,280 ac |

28 sq mi | 17,920 ac |

29 sq mi | 18,560 ac |

30 sq mi | 19,200 ac |

31 sq mi | 19,840 ac |

32 sq mi | 20,480 ac |

33 sq mi | 21,120 ac |

34 sq mi | 21,760 ac |

35 sq mi | 22,400 ac |

36 sq mi | 23,040 ac |

37 sq mi | 23,680 ac |

38 sq mi | 24,320 ac |

39 sq mi | 24,960 ac |

40 sq mi | 25,600 ac |

## More Square Mile Area Conversions

**US Customary**

- Convert to Square Yards
- 1 sq mi is equal to 3,097,600 square yards
- Convert to Square Feet
- 1 sq mi is equal to 27,878,400 square feet
- Convert to Square Inches
- 1 sq mi is equal to 4,014,489,599.5 square inches

**SI Units**

- Convert to Square Kilometers
- 1 sq mi is equal to 2.589988 square kilometers
- Convert to Square Meters
- 1 sq mi is equal to 2,589,988.1 square meters
- Convert to Square Centimeters
- 1 sq mi is equal to 25,899,881,100 square centimeters
- Convert to Square Millimeters
- 1 sq mi is equal to 2,589,988,110,000 square millimeters

**Other Metric Units**

- Convert to Hectares
- 1 sq mi is equal to 258.998811 hectares
- Convert to Ares
- 1 sq mi is equal to 25,899.9 ares