Square Miles to Square Kilometers
Convert square miles (mi²) to square kilometers (km²). Type in either box; the other updates as you go.
How to convert square miles to square kilometers
To convert square miles to square kilometers, multiply the number of square miles by 2.58998811.
Example
Convert 5 square miles to square kilometers:
Square Mile to square kilometer conversion chart
| Square Miles (mi²) | Square Kilometers (km²) |
|---|---|
| 1 mi² | 2.589988 km² |
| 2 mi² | 5.179976 km² |
| 3 mi² | 7.769964 km² |
| 4 mi² | 10.35995 km² |
| 5 mi² | 12.94994 km² |
| 6 mi² | 15.53993 km² |
| 7 mi² | 18.12992 km² |
| 8 mi² | 20.7199 km² |
| 9 mi² | 23.30989 km² |
| 10 mi² | 25.89988 km² |
| 12 mi² | 31.07986 km² |
| 15 mi² | 38.84982 km² |
| 20 mi² | 51.79976 km² |
| 25 mi² | 64.7497 km² |
| 30 mi² | 77.69964 km² |
| 40 mi² | 103.5995 km² |
| 50 mi² | 129.4994 km² |
| 60 mi² | 155.3993 km² |
| 70 mi² | 181.2992 km² |
| 75 mi² | 194.2491 km² |
| 80 mi² | 207.199 km² |
| 90 mi² | 233.0989 km² |
| 100 mi² | 258.9988 km² |
| 150 mi² | 388.4982 km² |
| 200 mi² | 517.9976 km² |
| 250 mi² | 647.497 km² |
| 500 mi² | 1,294.994 km² |
| 1,000 mi² | 2,589.988 km² |
Going the other way? See the square kilometers to square miles chart.
About the units
Square Mile (mi²)
A square mile is 640 acres, about 2.59 square kilometers.
Square Kilometer (km²)
A square kilometer is 1,000,000 square meters, or 100 hectares. The size of cities and countries is given in square kilometers.
Frequently asked questions
How many square kilometers are in a square mile?
There are 2.58998811 square kilometers in a square mile.
How many square miles are in a square kilometer?
There are 0.3861021585 square miles in a square kilometer.
How do you convert square miles to square kilometers?
To convert square miles to square kilometers, multiply the number of square miles by 2.58998811.
What is 5 square miles in square kilometers?
5 square miles equals 12.9499 square kilometers.
Convert between square feet, square meters, acres, hectares and other units of area. Open the area converter to see a value in every unit at once.