How to convert troy ounces to grams
- Take the value in troy ounces.
- Use the formula grams = troy ounces × 31.1034768.
- For example, 0.1 oz t is 3.11 g.
About troy ounces and grams
A troy ounce is exactly 31.1034768 grams. Multiply troy ounces by 31.1035 to get grams: a 10 oz silver bar holds 311.03 g and a tenth-ounce gold coin 3.11 g.
Gold, silver, platinum and palladium are priced in troy ounces around the world. The troy ounce is about 9.7% heavier than the ordinary (avoirdupois) ounce of 28.35 g used for food, so using the wrong ounce makes a bullion holding look smaller than it is.
Examples
- 0.1 oz t (a tenth-ounce gold coin) is 3.11 g
- 1 oz t (a one-ounce bullion coin) is 31.1 g
- 10 oz t (a 10 oz silver bar) is 311.03 g
- 400 oz t (roughly a London Good Delivery gold bar) is 12,441.39 g
Troy ounces to grams chart
| Troy ounces (oz t) | Grams (g) |
|---|---|
| 0.05 | 1.56 |
| 0.1 | 3.11 |
| 0.25 | 7.78 |
| 0.5 | 15.55 |
| 1 | 31.1 |
| 2 | 62.21 |
| 2.5 | 77.76 |
| 3 | 93.31 |
| 4 | 124.41 |
| 5 | 155.52 |
| Troy ounces (oz t) | Grams (g) |
|---|---|
| 10 | 311.03 |
| 15 | 466.55 |
| 20 | 622.07 |
| 25 | 777.59 |
| 32.15 | 999.98 |
| 50 | 1,555.17 |
| 100 | 3,110.35 |
| 400 | 12,441.39 |
| 1,000 | 31,103.48 |