Square Miles (mi²) to Square Kilometers (km²) Converter
Square Miles (mi²) to Square Kilometers (km²) conversion table
Here are the most common conversions for Square Miles (mi²) to Square Kilometers (km²) at a glance.
| Square Miles (mi²) | Square Kilometers (km²) |
|---|---|
| 0.001 | 0.00259000 |
| 0.01 | 0.02590000 |
| 0.1 | 0.25900000 |
| 1 | 2.59000000 |
| 2 | 5.18000000 |
| 3 | 7.77000000 |
| 5 | 12.95000000 |
| 10 | 25.90000000 |
| 20 | 51.80000000 |
| 30 | 77.70000000 |
| 50 | 129.50000000 |
| 100 | 259 |
| 1000 | 2,590 |
Square miles to Square kilometers (mi² to km²) Converter
Use our free Square miles to Square kilometers converter to change any value from mi² to km² instantly and accurately. 1 square mile equals 2.58998811 square kilometers, and 1 square kilometer equals 0.3861021585 square miles. Enter a number, choose the precision and get the result in one click.
Square mile to Square kilometer formula
To convert square miles to square kilometers, multiply the number of square miles by 2.58998811:
km² = mi² × 2.58998811
Example: 25 mi² × 2.58998811 = 64.74970276 km².
Square miles to Square kilometers conversion table
| Square miles (mi²) | Square kilometers (km²) |
|---|---|
| 1 mi² | 2.58998811 km² |
| 5 mi² | 12.94994055 km² |
| 10 mi² | 25.8998811 km² |
| 25 mi² | 64.74970276 km² |
| 50 mi² | 129.4994055 km² |
| 100 mi² | 258.998811 km² |
| 1,000 mi² | 2,589.98811 km² |
Square mile and Square kilometer explained
Square mile (mi²): A square mile is about 2.59 square kilometers and is used for cities, counties and land in the US.
Square kilometer (km²): A square kilometer equals one million square meters. It is used for cities, countries and large land areas.
How to use the Square mile to Square kilometer converter
- Enter the value in square miles (mi²).
- Choose the number of decimal places (precision).
- Click Submit to convert.
- Read or copy the result in square kilometers (km²).
Common use cases
- Converting area measurements for work, school or travel
- Checking area values in product specifications
- Quickly comparing metric and imperial or binary and decimal values
- Double-checking manual calculations
Frequently asked questions
How many square kilometers are in 1 square mile?
There are 2.58998811 square kilometers in one square mile.
How do I convert square kilometers back to square miles?
Multiply by 0.3861021585, or use our Square kilometer to Square mile converter.
Is this converter accurate?
Yes. It uses the official international conversion factors and lets you choose the number of decimal places.
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