Convert Square Kilometers to Square Miles
1 km² = 0.386102 mi². Enter any value below.
Converted to every unit
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Square Kilometers to Square Miles formula
mi² = km² × 0.386102
A square kilometer is 1,000,000 square meters, or 100 hectares. A square mile is 640 acres, about 2.59 square kilometers.
Worked example
To convert 5 km², multiply by 0.386102: 5 km² × 0.386102 = 1.930511 mi².
Square Kilometers to Square Miles conversion table
| Square Kilometers | Square Miles |
|---|---|
| 1 km² | 0.386102 mi² |
| 2 km² | 0.772204 mi² |
| 3 km² | 1.158306 mi² |
| 4 km² | 1.544409 mi² |
| 5 km² | 1.930511 mi² |
| 6 km² | 2.316613 mi² |
| 7 km² | 2.702715 mi² |
| 8 km² | 3.088817 mi² |
| 9 km² | 3.474919 mi² |
| 10 km² | 3.861022 mi² |
| 12 km² | 4.633226 mi² |
| 15 km² | 5.791532 mi² |
| 20 km² | 7.722043 mi² |
| 25 km² | 9.652554 mi² |
| 30 km² | 11.583065 mi² |
| 40 km² | 15.444086 mi² |
| 50 km² | 19.305108 mi² |
| 75 km² | 28.957662 mi² |
| 100 km² | 38.610216 mi² |
| 250 km² | 96.52554 mi² |
| 500 km² | 193.051079 mi² |
| 1,000 km² | 386.102159 mi² |
Frequently asked questions
How many square miles are in a square kilometer?
1 km² equals 0.386102 mi².
How do I convert square kilometers to square miles?
Use the formula mi² = km² × 0.386102. For example, 5 km² = 1.930511 mi².
Last reviewed: October 2026 · Uses exact, internationally defined conversion factors.