How to convert square kilometers to square miles
Formula: mi² = km² × 0.386102
Worked example: 10 km² → 10 × 0.386102 = 3.86102 mi²
Divide square kilometers by 2.58999 to get square miles. A city of 100 km² covers about 38.6 square miles. Remember that the factor is the length factor squared: 1.609344² = 2.58999.
Square kilometers to square miles conversion chart
| Square kilometers (km²) | Square miles (mi²) |
|---|---|
| 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 |
| 6 km² | 2.31661 mi² |
| 7 km² | 2.70272 mi² |
| 8 km² | 3.08882 mi² |
| 9 km² | 3.47492 mi² |
| 10 km² | 3.86102 mi² |
| 12 km² | 4.63323 mi² |
| 15 km² | 5.79153 mi² |
| 20 km² | 7.72204 mi² |
| 25 km² | 9.65255 mi² |
| 30 km² | 11.5831 mi² |
| 40 km² | 15.4441 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 |
What is a square kilometer?
The square kilometer equals one million square meters, or 100 hectares. It measures cities, lakes, parks and countries; Manhattan covers about 59 km² of land. One square kilometer is about 0.386 square mile.
What is a square mile?
The square mile equals 640 acres, about 2.59 km². It measures the area of US cities, counties and states, and in the public land survey a one-square-mile parcel is called a section.