Square Miles to Square Kilometers Converter
Enter the area in square miles below to convert it to square kilometers.
Result in Square Kilometers:
Do you want to convert square kilometers to square miles?
On this page:
- Square Miles to Square Kilometers Converter
- How to Convert Square Miles to Square Kilometers
- How Many Square Kilometers Are in a Square Mile?
- What Is a Square Mile?
- What Is a Square Kilometer?
- Square Mile to Square Kilometer Conversion Table
- More Square Mile & Square Kilometer Conversions
- Area Measurement IconConvert from Square Miles
- Area Measurement IconConvert to Square Kilometers
Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.
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.
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 |