Square kilometer to Square mile Converter
1 square kilometer is about 0.3861021585 square miles. Convert square kilometers (km²) to square miles (mi²) below: type a value and the result updates as you type.
km² to mi² calculator
Result
Square kilometer to Square mile conversion
1 km² ≈ 0.3861021585 mi²one square kilometer in square miles
1 mi² = 2.589988110336 km²one square mile in square kilometers
Square kilometer (km²): A square one kilometer on each side.
Square mile (mi²): A square one international mile on each side.
Source:Square kilometer: SI Brochure, 9th edition (BIPM, 2019); Square mile: International yard and pound agreement (1959)
How to convert square kilometers to square miles
To convert square kilometers to square miles, divide the number of square kilometers by 2.589988110336.
Formula
mi² = km² ÷ 2.589988110336
Examples
- 5 km² = 5 ÷ 2.589988110336 ≈ 1.930510793 mi²
- 25 km² = 25 ÷ 2.589988110336 ≈ 9.652553964 mi²
- 100 km² = 100 ÷ 2.589988110336 ≈ 38.61021585 mi²
Square kilometer to Square mile conversion table
| Square kilometer (km²) | Square mile (mi²) |
|---|---|
| 0.1 km² | 0.03861021585 mi² |
| 0.5 km² | 0.1930510793 mi² |
| 1 km² | 0.3861021585 mi² |
| 2 km² | 0.7722043171 mi² |
| 3 km² | 1.158306476 mi² |
| 5 km² | 1.930510793 mi² |
| 10 km² | 3.861021585 mi² |
| 20 km² | 7.722043171 mi² |
| 25 km² | 9.652553964 mi² |
| 50 km² | 19.30510793 mi² |
| 100 km² | 38.61021585 mi² |
| 250 km² | 96.52553964 mi² |
| 500 km² | 193.0510793 mi² |
| 1000 km² | 386.1021585 mi² |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- How many square miles are in one square kilometer?
- One square kilometer is about 0.3861021585 square miles.
- How do I convert square miles to square kilometers?
- To convert square miles to square kilometers, multiply the number of square miles by 2.589988110336. The formula is km² = mi² × 2.589988110336.
- Is this conversion exact?
- Yes. Both units have exact definitions and the factor 2.589988110336 is exact. Displayed results are only rounded when they have many decimal places.
- Which is larger, a square kilometer or a square mile?
- A square mile is 2.589988110336 times larger than a square kilometer. In other words, a square kilometer is about 0.3861021585 of a square mile.