Convert Square Kilometers to Square Miles
One square kilometer equals 0.386102 square miles. Type any value to convert square kilometers to square miles instantly — with a full reference table below.
Convert Square Kilometers to Square Miles
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How to convert Square Kilometers to Square Miles
To convert square kilometers to square miles, multiply by 0.386102. One square kilometer equals 0.386102 mi², and one square mile equals 2.589988 km².
- Take the value in square kilometers — for example 7.5 km².
- Multiply by 0.386102 (the number of square miles in one square kilometer).
- 7.5 × 0.386102 = 2.895766 mi².
Quick mental estimate: Divide the number of square kilometers by 2.6 (within 0.4% of the exact answer).
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 |
| 5 km² | 1.930511 mi² |
| 10 km² | 3.861022 mi² |
| 20 km² | 7.722043 mi² |
| 50 km² | 19.30511 mi² |
| 100 km² | 38.61022 mi² |
| 200 km² | 77.22043 mi² |
| 500 km² | 193.0511 mi² |
| 1,000 km² | 386.1022 mi² |
| 5,000 km² | 1,930.511 mi² |
| Square Miles | Square Kilometers |
|---|---|
| 1 mi² | 2.589988 km² |
| 2 mi² | 5.179976 km² |
| 3 mi² | 7.769964 km² |
| 5 mi² | 12.94994 km² |
| 10 mi² | 25.89988 km² |
| 20 mi² | 51.79976 km² |
| 50 mi² | 129.4994 km² |
| 100 mi² | 258.9988 km² |
| 200 mi² | 517.9976 km² |
| 500 mi² | 1,294.994 km² |
| 1,000 mi² | 2,589.988 km² |
| 5,000 mi² | 12,949.94 km² |
About converting Square Kilometers to Square Miles
Square Kilometers (km²) and Square Miles (mi²) are both units of area. The exact factor is 1 km² = 0.386102 mi², so multiply by 0.386102 to go from square kilometers to square miles (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Square Miles to Square Kilometers converter, or the full unit converter for every unit at once.
Real-world area in square kilometers and square miles
| Example | Square Kilometers | Square Miles |
|---|---|---|
| A doubles tennis court (23.77 × 10.97 m) | 0.000260757 km² | 0.000100679 mi² |
| An NBA basketball court (94 × 50 ft) | 0.000436644 km² | 0.000168589 mi² |
| An American football field (incl. end zones) | 0.00535122 km² | 0.00206612 mi² |
| A football pitch (105 × 68 m) | 0.00714 km² | 0.00275677 mi² |
| One acre | 0.00404686 km² | 0.0015625 mi² |
“≈” marks typical values; the rest are defined or measured figures.
The units
A square 1 km on each side — 1,000,000 m² or 100 hectares.
Used for: City, country and land areas.
A square 1 mile on each side: 640 acres, about 2.59 km².
Used for: US/UK land and city areas.
Area factors are the squares of exact length factors, so they are exact too (an international acre is exactly 4,046.8564224 m²).