Square Kilometers to Square Miles (km² to mi²)
Free online square kilometer to square mile converter. Type a value, get an instant exact result — plus the formula, a ready-made conversion table, and reverse conversion.
AREA CONVERTER — INSTANT RESULT
Formula: multiply the square kilometer value by 0.38610216 — i.e. mi² = km² × 0.38610216
Quick check: 1 km² = 0.38610216 mi²
Quick check: 1 km² = 0.38610216 mi²
Square Kilometers to Square Miles conversion table
| Square Kilometers (km²) | Square Miles (mi²) |
|---|---|
| 1 km² | 0.38610216 mi² |
| 2 km² | 0.77220432 mi² |
| 3 km² | 1.15830648 mi² |
| 4 km² | 1.54440863 mi² |
| 5 km² | 1.93051079 mi² |
| 6 km² | 2.31661295 mi² |
| 7 km² | 2.70271511 mi² |
| 8 km² | 3.08881727 mi² |
| 9 km² | 3.47491943 mi² |
| 10 km² | 3.86102159 mi² |
| 15 km² | 5.79153238 mi² |
| 20 km² | 7.72204317 mi² |
| 25 km² | 9.65255396 mi² |
| 30 km² | 11.58306476 mi² |
| 40 km² | 15.44408634 mi² |
| 50 km² | 19.30510793 mi² |
| 75 km² | 28.95766189 mi² |
| 100 km² | 38.61021585 mi² |
| 250 km² | 96.52553964 mi² |
| 500 km² | 193.05107927 mi² |
| 1,000 km² | 386.10215854 mi² |
How to convert square kilometers to square miles
To convert square kilometers to square miles, multiply the amount in square kilometers by 0.38610216. For example, 10 km² = 3.86102159 mi². To convert in the other direction, divide by the same factor, or use the ⇄ swap button above.
Convert between metric and imperial/US land area units, including the acre (43,560 ft² exactly) and hectare (10,000 m²) used worldwide for land measurement.
Frequently asked questions
How many square miles are in one square kilometer?
One square kilometer is exactly 0.38610216 square miles.
How do I convert km² to mi²?
Multiply the km² value by 0.38610216 to get mi². The converter at the top of this page does this automatically and works in both directions.
How much is 100 square kilometers in square miles?
100 square kilometers equals 38.61021585 square miles.