Convert square kilometers to square miles
1 km² = 0.386102158542 mi² — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.386 102 158 542mi²
As a fraction: 244140625/632321316
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1 km² = 0.386102158542 mi²
Show this value in all 25 area units
- Square kilometers km² 1
- Square hectometers hm² 100
- Square decameters dam² 10 000
- Square meters m² 1 000 000
- Square decimeters dm² 100 000 000
- Square centimeters cm² 10 000 000 000
- Square millimeters mm² 1 000 000 000 000
- Square micrometers µm² 1e+18
- Square nanometers nm² 1e+24
- Hectares ha 100
- Ares a 10 000
- Decares daa 1000
- Square inches in² 1 550 003 100.01
- Square feet ft² 10 763 910.4167
- Square yards yd² 1 195 990.0463
- Square miles mi² 0.386 102 158 542
- Acres ac 247.105 381 467
- Roods ro 988.421 525 869
- Square rods rd² 39 536.861 034 7
- Sections section 0.386 102 158 542
- Townships twp 0.010 725 059 959 5
- Roofing squares sq 107 639.104 167
- Circular mils cmil 1 973 525 241 390 000
- Barns b 1e+34
- Tsubos 坪 302 500
Every row is Square kilometer (km²) converted through the square meter, in exact rational arithmetic.
How to convert square kilometers to square miles
Multiply the number of square kilometers by 0.386102158542 to get square miles.
Square kilometer to Square mile conversion table
| Square kilometers (km²) | Square miles (mi²) |
|---|---|
| 1 km² | 0.386 102 16 |
| 2 km² | 0.772 204 32 |
| 3 km² | 1.158 306 5 |
| 5 km² | 1.930 510 8 |
| 10 km² | 3.861 021 6 |
| 20 km² | 7.722 043 2 |
| 25 km² | 9.652 554 |
| 50 km² | 19.305 108 |
| 100 km² | 38.610 216 |
| 250 km² | 96.525 54 |
| 500 km² | 193.051 08 |
| 1000 km² | 386.102 16 |
Square mile to Square kilometer conversion table
| Square miles (mi²) | Square kilometers (km²) |
|---|---|
| 1 mi² | 2.589 988 1 |
| 2 mi² | 5.179 976 2 |
| 3 mi² | 7.769 964 3 |
| 5 mi² | 12.949 941 |
| 10 mi² | 25.899 881 |
| 20 mi² | 51.799 762 |
| 25 mi² | 64.749 703 |
| 50 mi² | 129.499 41 |
| 100 mi² | 258.998 81 |
| 250 mi² | 647.497 03 |
| 500 mi² | 1294.9941 |
| 1000 mi² | 2589.9881 |
Frequently asked
How many square miles are in a square kilometer?
One square kilometer equals 0.3861021585 square miles (km² → mi²). That figure is exact, not rounded.
How do you convert square kilometers to square miles?
Multiply the number of square kilometers by 0.386102158542 to get square miles.
What is 1 mi² in square kilometers?
One square mile is 2.58998811 square kilometers.
What is 10 km² in mi²?
10 km² = 3.861 021 6 mi².