Weight:
| 1 troy ounce | = | 1.097 ordinary ounces |
| 1 troy ounce | = | 480 grains |
| 1 troy ounce | = | 31.1 grams |
| 1 troy ounce | = | 20 dwt (pennyweight) |
| 18.2291 dwt | = | 1 ordinary ounce |
| 1 troy pond | = | 12 troy ounces |
| 1000 troy ounces | = | 31.3 kilograms |
| 1 gram | = | .03215 troy ounces |
| 1 kilogram | = | 32.15 troy ounces |
| 1 ton | = | 32,150 troy ounces |
| 1 ordinary ounce | = | .9115 troy ounces |
| 1 ordinary pound | = | 14.58 troy ounces |
Fineness and Karat Weight
| Percent Gold | European System | Karat System |
| 100% | 1000 fine | 24 karat |
| 91.7% | 917 fine | 22 karat |
| 75.0% | 750 fine | 18 karat |
| 58.5% | 585 fine | 14 karat |
| 41.6% | 416 fine | 10 karat |
