How to convert square kilometers to square miles
Square Kilometers and Square Miles both measure area, so converting is a single multiplication. One km² equals 0.386102 mi², so you multiply your square kilometers value by 0.386102.
Formula: square miles = square kilometers × 0.386102. For example, 10 km² = 3.861022 mi².
Square Kilometers to Square Miles conversion table
| Square Kilometers (km²) | Square Miles (mi²) |
|---|---|
| 1 | 0.386102 |
| 2 | 0.772204 |
| 5 | 1.930511 |
| 10 | 3.861022 |
| 25 | 9.652554 |
| 50 | 19.305108 |
| 100 | 38.610216 |
| 1,000 | 386.102159 |
Square Kilometers and Square Miles explained
Square Kilometers (km²): One million square metres, used for regions and countries.
Square Miles (mi²): An imperial unit for large areas of land.
When you'd convert square kilometers to square miles
You'll convert square kilometers to square miles whenever a measurement is given in one unit but you need it in the other — comparing square kilometers and square miles figures across regions, following a recipe or spec, or double-checking a number. Because 1 km² is exactly 0.386102 mi², the result is precise every time.
Frequently asked questions
How many square miles are in a square kilometer?
One km² equals 0.386102 mi². Multiply your square kilometers figure by 0.386102 to get square miles.
What is the formula to convert square kilometers to square miles?
square miles = square kilometers × 0.386102. The factor 0.386102 is exact.
What is 2 square kilometers in square miles?
2 km² = 0.772204 mi². You can enter any value in the converter above to get an instant result.
Is this Square Kilometers to Square Miles converter accurate?
Yes. It uses the standard conversion factor (1 km² = 0.386102 mi²) defined by BIPM — SI Brochure (derived units), so results are exact to several decimal places.