| 1 km² = 10000000000 cm² |
| 2 km² = 20000000000 cm² |
| 3 km² = 30000000000 cm² |
| 4 km² = 40000000000 cm² |
| 5 km² = 50000000000 cm² |
| 6 km² = 60000000000 cm² |
| 7 km² = 70000000000 cm² |
| 8 km² = 80000000000 cm² |
| 9 km² = 90000000000 cm² |
| 10 km² = 100000000000 cm² |
| 15 km² = 150000000000 cm² |
| 50 km² = 500000000000 cm² |
| 100 km² = 1000000000000 cm² |
| 500 km² = 5000000000000 cm² |
| 1000 km² = 10000000000000 cm² |
| 5000 km² = 50000000000000 cm² |
| 10000 km² = 100000000000000 cm² |