| 100 sq mm | 1 sq cm | |
| 10,000 centimeters | 1 sq m | |
| 100 sq meters | 1 are (a) | |
| 100 ares | 1 hectare | |
| 100 hectares | 1 sq km | |
| 144 sq inches | 1 sq ft | |
| 9 sq feet | 1 sq yard = 1296 sq in | |
| 30 1/4 sq yards | 1 sq rod = 272 1/4 sq ft | |
| 160 sq rods | 1 acre = 4,840 sq yds | |
| 640 acres | 1 sq mile | |
| 1 sq mile | 1 section | |
| 6 sq miles | 1 township = 36 sections | |