Square Mile to Square Kilometer Converter
Convert square mile to square kilometer instantly.
Standard area units
Fun comparisons
How to convert square mile to square kilometer
Enter your area in square mile and get the equivalent in square kilometer instantly. The converter includes real-world comparisons - like football fields and tennis courts - to help you visualize the space.
Square miles are used for large land areas in the US and UK; square kilometers are the metric equivalent used in most other countries. One square mile equals approximately 2.59 square kilometers.
Need the opposite direction? Convert square kilometer to square mile just as easily, or explore all our area conversions.
Common square mile to square kilometer conversions
| Square Mile (mi²) | Square Kilometer (km²) |
|---|---|
| 1 | 2.58999 |
| 5 | 12.9499 |
| 10 | 25.8999 |
| 25 | 64.7497 |
| 50 | 129.499 |
| 100 | 258.999 |
| 500 | 1294.99 |
| 1000 | 2589.99 |
Frequently asked questions
1 square mile equals 2.58999 square kilometer.
Multiply by 2.58999. For example, 5 mi² = 12.9499 km².
10 square miles equals approximately 25.9 square kilometers.
1 square kilometer equals 0.386102 square mile.
100 square mile equals 258.999 square kilometer.