Square Kilometers to Square Miles Converter
Convert square kilometers (km²) to square miles (mi²). Type a number in either box and the result appears as you type.
Enter a number, for example 12.5
1 square kilometer = 0.3861021585 square miles
Formula: mi² = km² ÷ 2.58998811
How to convert square kilometers to square miles
1 square kilometer = 0.3861021585 square miles
To convert square kilometers to square miles, divide the value by 2.58998811.
Example: 5 km² ÷ 2.58998811 = 1.930510793 mi²
Square Kilometers to Square Miles conversion table
| Square kilometer (km²) | Square mile (mi²) |
|---|---|
| 1 | 0.38610216 |
| 2 | 0.77220432 |
| 3 | 1.1583065 |
| 4 | 1.5444086 |
| 5 | 1.9305108 |
| 10 | 3.8610216 |
| 15 | 5.7915324 |
| 20 | 7.7220432 |
| 25 | 9.652554 |
| 50 | 19.305108 |
| 75 | 28.957662 |
| 100 | 38.610216 |
| 250 | 96.52554 |
| 500 | 193.05108 |
| 1,000 | 386.10216 |
About square kilometers and square miles
Square kilometer (km²)
1,000,000 square meters, or 100 hectares. Used for the areas of cities and countries.
Square mile (mi²)
640 acres, about 2.59 square kilometers.
Frequently asked questions
What is 1 km² in square miles?
1 km² = 0.3861021585 mi².
What is 1 mi² in square kilometers?
1 mi² = 2.58998811 km².
How do I convert square kilometers to square miles?
To convert square kilometers to square miles, divide the value by 2.58998811. 1 square kilometer = 0.3861021585 square miles.