Square kilometers to Square miles formula
square miles = square kilometers × 0.386102
Multiply the number of square kilometers by 0.386102 to get square miles. To go the other way, multiply by 2.58999 instead, or use the square miles to square km converter.
Square kilometers to Square miles conversion table
Common square km to square miles values, rounded for reading. The converter above keeps full precision.
| Square kilometers | Square miles |
|---|---|
| 1 km² | 0.386102 mi² |
| 2 km² | 0.772204 mi² |
| 3 km² | 1.15831 mi² |
| 4 km² | 1.54441 mi² |
| 5 km² | 1.93051 mi² |
| 10 km² | 3.86102 mi² |
| 15 km² | 5.79153 mi² |
| 20 km² | 7.72204 mi² |
| 25 km² | 9.65255 mi² |
| 50 km² | 19.3051 mi² |
| 75 km² | 28.9577 mi² |
| 100 km² | 38.6102 mi² |
| 250 km² | 96.5255 mi² |
| 500 km² | 193.051 mi² |
| 1,000 km² | 386.102 mi² |
Worked example
To convert 10 km² to square miles, multiply by 0.386102: the result is 3.86102 mi². Area conversion factors are squared length factors. One acre equals exactly 4,046.8564224 square meters.
Frequently asked questions
How many square miles are in a square kilometer?
One square kilometer equals 0.386102 square miles (1 km² = 0.386102 mi²).
What is 10 square kilometers in square miles?
10 km² converts to 3.86102 mi². Enter any other value in the converter above to see it recalculated instantly.
How do I convert square miles back to square kilometers?
Reverse the calculation: one square mile equals 2.58999 square kilometers. You can also swap the units in the converter or open the square miles to square km page.
Related area conversions
Need a different pair? Open the full area converter to choose any two units.