Square Kilometer to Square Mile Converter (km² to mi²)
1 square kilometer = 0.386102 square mile. A square mile is 2.58999 square kilometers.
Result
100 km² = 38.610216 mi²
How to convert square kilometer to square mile
A square mile is 2.58999 square kilometers. It is used for the area of cities, counties and countries in the US and UK, while the rest of the world quotes square kilometers.
Formula
mi² = km² × 0.386102
Worked example
100 km² × 0.386102 = 38.6102 mi²
Square Kilometer to Square Mile quick-reference table
| Square Kilometer (km²) | Square Mile (mi²) |
|---|---|
| 1 km² | 0.386102 mi² |
| 5 km² | 1.93051 mi² |
| 10 km² | 3.86102 mi² |
| 25 km² | 9.65255 mi² |
| 50 km² | 19.3051 mi² |
| 100 km² | 38.6102 mi² |
Real-life examples
A 100 km2 park is 38.6 sq mi, and the 9,600,000 km2 area of a large country is about 3.7 million sq mi.
Frequently asked questions
How many km2 are in a square mile?
One square mile is 2.59 square kilometers.
How many acres are in a square mile?
A square mile is 640 acres.
What is 1 square kilometer in square mile?
1 square kilometer = 0.386102 square mile (km² to mi²).
What is the formula to convert km² to mi²?
mi² = km² × 0.386102. For example, 100 km² × 0.386102 = 38.6102 mi².
How do I convert mi² back to km²?
Use the reverse converter: 1 square mile = 2.58999 square kilometer. Check: 38.6102 mi² converts back to 100 km².
Reverse conversion
Need the other direction? Square Mile to Square Kilometer converter (mi² to km²): 1 square mile = 2.58999 square kilometer.
Related area conversions
- Square Foot to Square Meter converter
- Acre to Hectare converter
- Square Meter to Square Foot converter
- Hectare to Acre converter
- Acre to Square Foot converter
- Square Foot to Acre converter