# Square Miles to Square Kilometers Converter

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

**Results in Square Kilometers:**

Do you want to convert square kilometers to square miles?

## How to Convert Square Miles to Square Kilometers

To convert a measurement in square miles to a measurement in square kilometers, multiply the area by the following conversion ratio: 2.589988 square kilometers/square mile.

Since one square mile is equal to 2.589988 square kilometers, you can use this simple formula to convert:

square kilometers = square miles × 2.589988

The area in square kilometers is equal to the area in square miles multiplied by 2.589988.

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

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

There are **2.589988** square kilometers in a square mile, which is why we use this value in the formula above.

1 sq mi = 2.589988 sq km

Square miles and square kilometers 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 Square Kilometer?

One square kilometer is equivalent to the area of a square with sides that are each 1 kilometer in length. One square kilometer is equal to 0.386102 square miles or 1,000,000 square meters.

The square kilometer, or square kilometre, is a multiple of the square meter, which is the SI derived unit for area. In the metric system, "kilo" is the prefix for thousands, or 10^{3}. A square kilometer is sometimes also referred to as a square km. Square kilometers can be abbreviated as *sq km*, and are also sometimes abbreviated as *km²*. For example, 1 square kilometer can be written as 1 sq km or 1 km².

Learn more about square kilometers.

## Square Mile to Square Kilometer Conversion Table

Square Miles | Square Kilometers |
---|---|

1 sq mi | 2.59 sq km |

2 sq mi | 5.18 sq km |

3 sq mi | 7.77 sq km |

4 sq mi | 10.36 sq km |

5 sq mi | 12.95 sq km |

6 sq mi | 15.54 sq km |

7 sq mi | 18.13 sq km |

8 sq mi | 20.72 sq km |

9 sq mi | 23.31 sq km |

10 sq mi | 25.9 sq km |

11 sq mi | 28.49 sq km |

12 sq mi | 31.08 sq km |

13 sq mi | 33.67 sq km |

14 sq mi | 36.26 sq km |

15 sq mi | 38.85 sq km |

16 sq mi | 41.44 sq km |

17 sq mi | 44.03 sq km |

18 sq mi | 46.62 sq km |

19 sq mi | 49.21 sq km |

20 sq mi | 51.8 sq km |

21 sq mi | 54.39 sq km |

22 sq mi | 56.98 sq km |

23 sq mi | 59.57 sq km |

24 sq mi | 62.16 sq km |

25 sq mi | 64.75 sq km |

26 sq mi | 67.34 sq km |

27 sq mi | 69.93 sq km |

28 sq mi | 72.52 sq km |

29 sq mi | 75.11 sq km |

30 sq mi | 77.7 sq km |

31 sq mi | 80.29 sq km |

32 sq mi | 82.88 sq km |

33 sq mi | 85.47 sq km |

34 sq mi | 88.06 sq km |

35 sq mi | 90.65 sq km |

36 sq mi | 93.24 sq km |

37 sq mi | 95.83 sq km |

38 sq mi | 98.42 sq km |

39 sq mi | 101.01 sq km |

40 sq mi | 103.6 sq km |

## More Square Mile & Square Kilometer Conversions

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