Square Miles to Square Kilometers Converter
Enter the area in square miles below to convert it to square kilometers.
Result: Square Kilometers
Do you want to convert square kilometers to square miles?
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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.
square kilometers = (5 sq mi × 2.589988) = 12.949941 sq km
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 103. 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 |