How Do You Convert Grams to Troy Ounces?
Divide grams by 31.1035 to get troy ounces. The formula is: Troy Ounces = Grams / 31.1035 (or multiply by 0.0321507). This is the standard conversion used in precious metal markets worldwide.
Dana Kowalski recovers gold from old electronics as a hobby. She refines 85 grams of gold from circuit board fingers. Converting: 85 / 31.1035 = 2.733 troy ounces. At $2,100 per troy ounce, her refined gold is worth about $5,739. She spent $200 on chemicals and equipment, netting a satisfying profit from what would have been e-waste.
Gold Weight and Value Reference
| Grams | Troy Ounces | Gold Value (at ~$2,100/ozt) |
|---|---|---|
| 1 g | 0.0322 ozt | $67.52 |
| 5 g | 0.1608 ozt | $337.59 |
| 10 g | 0.3215 ozt | $675.18 |
| 31.1 g | 1.0 ozt | $2,100 |
| 50 g | 1.6075 ozt | $3,375.88 |
| 100 g | 3.2151 ozt | $6,751.76 |
| 500 g | 16.075 ozt | $33,758 |
| 1,000 g (1 kg) | 32.151 ozt | $67,517 |
Practical Applications
Selling Gold Jewelry
Priya Patel helps her grandmother sell old gold jewelry. The pieces weigh 42 grams of 14K gold. Since 14K is 58.3% pure, the gold content is 42 x 0.583 = 24.49 grams = 0.787 troy ounces. At $2,100/ozt, the melt value is $1,653. A reputable buyer offers $1,400 (85% of melt), which is a fair price since the buyer has refining costs.
Silver Bullion Investing
Tom Brewer compares silver products. A 1-kilogram silver bar = 1,000 g = 32.15 troy ounces. At $28/ozt, the silver value is $900.20. The dealer charges $935, a 3.9% premium. He compares to 1-ounce coins at $32 each; buying 32.15 coins would cost $1,028.80 — a 14.3% premium. The kilo bar offers better value per gram of silver.
Dental Gold Recovery
Marco Ferreira learns about precious metal recycling. A dental crown typically contains 2-3 grams of gold alloy. At 60% gold purity, one crown holds about 1.5 grams of pure gold = 0.048 ozt = about $101 in gold. Dental recyclers collect thousands of crowns: 1,000 crowns could yield 1,500 grams = 48.2 ozt = about $101,200 in gold.