A compact table of factors between metric and imperial units.
| From | To | Multiply by |
|---|---|---|
| inch | millimetre | 25.4 |
| foot | metre | 0.3048 |
| mile | kilometre | 1.609344 |
| ounce | gram | 28.349523 |
| pound | kilogram | 0.45359237 |
| gallon (US) | litre | 3.785412 |
| acre | hectare | 0.404686 |
Values follow the international yard and pound agreement of 1959.