Convert gold weight from troy ounces to grams using the standard precious-metal conversion. Enter a troy-ounce weight to calculate the equivalent number of grams and see additional common gold-weight equivalents.
Uses the standard 31.1034768 grams per troy ounce.
This conversion is based solely on mass. Gold purity does not alter the relationship between troy ounces and grams.
One troy ounce of gold equals exactly 31.1034768 grams. The troy ounce is the conventional precious-metal weight unit used for gold, silver, platinum and palladium.
To convert troy ounces to grams, multiply the number of troy ounces by 31.1034768.
The conversion is a direct mass calculation and does not depend on gold price or purity.
For example, a gold weight of 2.5 troy ounces converts to:
This same formula works for small quantities, bullion bars, coins, jewellery weights and larger precious-metal holdings.
| Troy Ounces | Grams |
|---|---|
| 0.01 troy oz | 0.311034768 g |
| 0.1 troy oz | 3.11034768 g |
| 0.25 troy oz | 7.7758692 g |
| 0.5 troy oz | 15.5517384 g |
| 1 troy oz | 31.1034768 g |
| 2 troy oz | 62.2069536 g |
| 5 troy oz | 155.517384 g |
| 10 troy oz | 311.034768 g |
| 20 troy oz | 622.069536 g |
| 32.1507466 troy oz | ≈ 1,000 g |
A troy ounce is different from the avoirdupois ounce used for many everyday products.
| Unit | Mass in Grams | Typical Use |
|---|---|---|
| Troy ounce | 31.1034768 g | Precious metals |
| Avoirdupois ounce | 28.349523125 g | General goods |
This distinction is important when reading gold prices or bullion specifications. A precious-metal quotation stated per ounce normally refers to the troy ounce.
No. The conversion between troy ounces and grams is based on mass and is independent of purity.
One troy ounce of 24K gold and one troy ounce of 18K gold both have a gross mass of 31.1034768 grams. What changes is the amount of fine gold contained in that weight.
For example, one troy ounce of 18K gold contains approximately:
Troy ounces are widely used for precious-metal bullion because the unit provides a standardized way to state the mass of gold being traded.
Many bullion coins are specified using troy-ounce denominations. Always check the stated fineness and fine-gold content when evaluating a particular coin.
Bars may be listed in troy ounces, grams or kilograms. Converting them to a common unit makes weight comparisons easier.
Converting troy ounces into grams can be useful when maintaining metric inventory records or comparing products quoted using different units.
| 1 Troy Ounce | Equivalent |
|---|---|
| Grams | 31.1034768 g |
| Milligrams | 31,103.4768 mg |
| Kilograms | 0.0311034768 kg |
| Tola | ≈ 2.66667 tola |
| Pennyweight | 20 DWT |
| Grains | 480 grains |
The reverse conversion uses division instead of multiplication.
For example, 100 grams of gold equals approximately:
The two conversions are mathematical inverses and use the same standard conversion constant.
This tool converts weight only. It does not determine gold purity, authenticity, market value or dealer buyback value.
It does not use live gold prices. If you are evaluating a gold product, the converted weight should be considered separately from the product's price, purity, premium, taxes and other costs.
For physical gold, use verified scale measurements and reliable assay or fineness information for product-specific decisions.
One troy ounce equals exactly 31.1034768 grams.
Multiply the troy-ounce weight by 31.1034768.
No. A troy ounce is 31.1034768 grams, while a standard avoirdupois ounce is approximately 28.349523125 grams.
10 troy ounces equals 311.034768 grams.
No. The conversion is based on mass and is independent of purity.
The troy ounce is the conventional weight unit used for precious metals.
Yes. Divide grams by 31.1034768.
No. It is a weight conversion tool and does not require a gold price.