| 1 mm² = 0.000000000001 km² |
| 2 mm² = 0.000000000002 km² |
| 3 mm² = 0.000000000003 km² |
| 4 mm² = 0.000000000004 km² |
| 5 mm² = 0.000000000005 km² |
| 6 mm² = 0.000000000006 km² |
| 7 mm² = 0.000000000007 km² |
| 8 mm² = 0.000000000008 km² |
| 9 mm² = 0.000000000009 km² |
| 10 mm² = 0.00000000001 km² |
| 15 mm² = 0.000000000015 km² |
| 50 mm² = 0.00000000005 km² |
| 100 mm² = 0.0000000001 km² |
| 500 mm² = 0.0000000005 km² |
| 1000 mm² = 0.000000001 km² |
| 5000 mm² = 0.000000005 km² |
| 10000 mm² = 0.00000001 km² |