Common conversions
These are rough numbers for quick conversions.
| 1 mile | 1.6 km |
| 1 nautical mile | 1.8 km |
| 1 knot | 1.8 km/h |
| 1 foot | 30 cm |
| 1 ft² | 0.09 m² |
| 1 acre | 4046 m² |
| 1 inch | 2.5 cm |
| 1 gallon | 3.7 l |
These are rough numbers for quick conversions.
| 1 mile | 1.6 km |
| 1 nautical mile | 1.8 km |
| 1 knot | 1.8 km/h |
| 1 foot | 30 cm |
| 1 ft² | 0.09 m² |
| 1 acre | 4046 m² |
| 1 inch | 2.5 cm |
| 1 gallon | 3.7 l |