How to convert square kilometers to square miles
To convert square kilometers (km²) to square miles (mi²), multiply the value in square kilometers by 0.386102158542.
mi² = km² × 0.386102158542
Example: 5 km² = 1.930510793 mi².
You can also type 5 km² to mi² into the smart calculator, or mix units: 1 km² + 1 mi².
Square Kilometers to Square Miles conversion table
| Square Kilometers | Square Miles |
|---|---|
| 0.01 km² | 0.0038610216 mi² |
| 0.1 km² | 0.038610216 mi² |
| 0.25 km² | 0.09652554 mi² |
| 0.5 km² | 0.19305108 mi² |
| 1 km² | 0.38610216 mi² |
| 2 km² | 0.77220432 mi² |
| 3 km² | 1.1583065 mi² |
| 4 km² | 1.5444086 mi² |
| 5 km² | 1.9305108 mi² |
| 6 km² | 2.316613 mi² |
| 7 km² | 2.7027151 mi² |
| 8 km² | 3.0888173 mi² |
| 9 km² | 3.4749194 mi² |
| 10 km² | 3.8610216 mi² |
| 12 km² | 4.6332259 mi² |
| 15 km² | 5.7915324 mi² |
| 20 km² | 7.7220432 mi² |
| 25 km² | 9.652554 mi² |
| 30 km² | 11.583065 mi² |
| 40 km² | 15.444086 mi² |
| 50 km² | 19.305108 mi² |
| 60 km² | 23.16613 mi² |
| 75 km² | 28.957662 mi² |
| 100 km² | 38.610216 mi² |
| 250 km² | 96.52554 mi² |
| 500 km² | 193.05108 mi² |
| 1,000 km² | 386.10216 mi² |
Converting square miles back to square kilometers
1 mi² = 2.58998811 km². See the Square Miles to Square Kilometers converter, or press the swap button above.
About the units
Square kilometer (km²)
A unit of area.
Square mile (mi²)
Exactly 640 acres, about 2.59 square kilometers.
Area measures a two-dimensional surface. The SI unit is the square meter. Property is often measured in square feet, while land uses acres or hectares: one hectare is 10,000 square meters, about 2.471 acres.
Questions and answers
How many square miles are in a square kilometer?
One square kilometer (km²) equals 0.3861021585 square miles (mi²).
How do I convert square kilometers to square miles?
To convert square kilometers to square miles, multiply the value in square kilometers by 0.386102158542. The formula is mi² = km² × 0.386102158542. For example, 5 km² = 1.9305108 mi².
What is 5 km² in mi²?
5 square kilometers is 1.930510793 square miles.
Which is bigger, a square kilometer or a square mile?
A square mile is bigger: 1 mi² = 2.58998811 km².
How big is an acre?
An acre is exactly 43,560 square feet, about 4,047 square meters or 0.405 hectares. A hectare is about 2.471 acres.
Does this km² to mi² converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.