Convert square miles to square kilometers
1 mi² = 2.589988 km². Change the amount below, or read the formula and the reference table further down.
1 square mile equals
square kilometers
1 mi² = 2.589988 km²
The formula
Square miles and square kilometers both measure area from the same zero, so a single multiplier does the job.
km² = mi² × 2.58998811
Going the other way? Convert square kilometers to square miles.
Square miles to square kilometers table
Common values, rounded for reading.
| Square miles (mi²) | Square kilometers (km²) |
|---|---|
| 1 | 2.59 |
| 2 | 5.18 |
| 3 | 7.77 |
| 4 | 10.36 |
| 5 | 12.9499 |
| 6 | 15.5399 |
| 7 | 18.1299 |
| 8 | 20.7199 |
| 9 | 23.3099 |
| 10 | 25.8999 |
| 15 | 38.8498 |
| 20 | 51.7998 |
| 25 | 64.7497 |
| 30 | 77.6996 |
| 40 | 103.6 |
| 50 | 129.5 |
| 75 | 194.25 |
| 100 | 259 |
| 250 | 647.5 |
| 500 | 1,294.99 |
| 1,000 | 2,589.99 |
Questions people ask
- How many square kilometers are in a square mile?
- One square mile equals 2.58998811 square kilometers.
- How do I convert square miles to square kilometers by hand?
- Multiply the number of square miles by 2.58998811. For a rough check, 2.6 is close enough for most everyday use.
- What is 1 square mile in square kilometers?
- 1 square mile is 2.589988 square kilometers.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.