# Square Miles to Hectares Converter

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

**Results in Hectares:**

Do you want to convert hectares to square miles?

## How to Convert Square Miles to Hectares

To convert a measurement in square miles to a measurement in hectares, multiply the area by the following conversion ratio: 258.998811 hectares/square mile.

Since one square mile is equal to 258.998811 hectares, you can use this simple formula to convert:

hectares = square miles × 258.998811

The area in hectares is equal to the area in square miles multiplied by 258.998811.

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

### How Many Hectares Are in a Square Mile?

There are **258.998811** hectares in a square mile, which is why we use this value in the formula above.

1 sq mi = 258.998811 ha

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

## What Is a Square Mile?

One square mile is equal to the area of a square with sides that are each 1 mile long. One square mile is roughly equal to 2.59 square kilometers or 640 acres.

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.

Learn more about square miles.

## What Is a Hectare?

One hectare is equal to 10,000 square meters,^{[1]} or the area of a square with 100 meter sides.

The hectare is an SI accepted unit for area for use with the metric system. In the metric system, "hecto" is the prefix for 10^{2}. Hectares can be abbreviated as *ha*; for example, 1 hectare can be written as 1 ha.

Learn more about hectares.

## Square Mile to Hectare Conversion Table

Square Miles | Hectares |
---|---|

1 sq mi | 259 ha |

2 sq mi | 518 ha |

3 sq mi | 777 ha |

4 sq mi | 1,036 ha |

5 sq mi | 1,295 ha |

6 sq mi | 1,554 ha |

7 sq mi | 1,813 ha |

8 sq mi | 2,072 ha |

9 sq mi | 2,331 ha |

10 sq mi | 2,590 ha |

11 sq mi | 2,849 ha |

12 sq mi | 3,108 ha |

13 sq mi | 3,367 ha |

14 sq mi | 3,626 ha |

15 sq mi | 3,885 ha |

16 sq mi | 4,144 ha |

17 sq mi | 4,403 ha |

18 sq mi | 4,662 ha |

19 sq mi | 4,921 ha |

20 sq mi | 5,180 ha |

21 sq mi | 5,439 ha |

22 sq mi | 5,698 ha |

23 sq mi | 5,957 ha |

24 sq mi | 6,216 ha |

25 sq mi | 6,475 ha |

26 sq mi | 6,734 ha |

27 sq mi | 6,993 ha |

28 sq mi | 7,252 ha |

29 sq mi | 7,511 ha |

30 sq mi | 7,770 ha |

31 sq mi | 8,029 ha |

32 sq mi | 8,288 ha |

33 sq mi | 8,547 ha |

34 sq mi | 8,806 ha |

35 sq mi | 9,065 ha |

36 sq mi | 9,324 ha |

37 sq mi | 9,583 ha |

38 sq mi | 9,842 ha |

39 sq mi | 10,101 ha |

40 sq mi | 10,360 ha |

## References

- Cambridge Dictionary, hectare, https://dictionary.cambridge.org/us/dictionary/english/hectare

## More Square Mile & Hectare Conversions

- square miles to acres
- square miles to square yards
- square miles to square feet
- square miles to square inches
- square miles to square kilometers
- square miles to square meters
- square miles to square centimeters
- square miles to square millimeters
- square miles to ares
- acres to hectares
- square yards to hectares
- square feet to hectares
- square inches to hectares
- square kilometers to hectares
- square meters to hectares
- square centimeters to hectares
- square millimeters to hectares
- ares to hectares