One gram equals 0.0321507466 troy ounces, and one troy ounce equals 31.1034768 grams exactly. The calculator below converts either way using that single fixed factor, with common values, the troy-versus-avoirdupois distinction and live platinum prices per gram further down the page.
Converter
Exact factors, fixed by definition. No price data.| Unit | Equivalent |
|---|---|
| Troy ounces (oz t) | 0.0321507466 |
| Kilograms (kg) | 0.001 |
| Pennyweights (dwt) | 0.6430149314 |
| Tola | 0.0857353242 |
| Troy pounds (lb t) | 0.0026792289 |
| Grains (gr) | 15.43235835 |
| Avoirdupois ounces (oz) | 0.0352739619 |
| Avoirdupois pounds (lb) | 0.0022046226 |
How Many Troy Ounces Are in a Gram?#
One gram is 0.0321507466 troy ounces, the exact inverse of 1 troy ounce = 31.1034768 grams, the definition the London Bullion Market Association's glossary states and the precious metals industry has used since the 1959 International Yard and Pound Agreement. This converter is one of DailyPlatinum's platinum calculators and converters, each built on that same exact troy-ounce factor.
Grams to Troy Ounces: Common Values#
10 grams converts to 0.321507466 troy ounces and 100 grams to 3.21507466 troy ounces, scaling linearly from the exact gram-to-ounce factor. Every row below uses the same 0.0321507466 multiplier, so a value between two rows scales the same way.
| Grams | Troy ounces |
|---|---|
| 1 | 0.0321507466 |
| 5 | 0.1607537 |
| 10 | 0.3215075 |
| 20 | 0.6430149 |
| 31.1034768 (= 1 ozt) | 1 |
| 50 | 1.6075373 |
| 100 | 3.2150747 |
| 500 | 16.0753733 |
| 1,000 | 32.1507466 |
1,000 Grams to Troy Ounces#
1,000 grams (1 kilogram) equals 32.1507466 troy ounces, or 35.27 avoirdupois ounces if you mean the everyday ounce rather than the bullion ounce. A dedicated kilogram to troy ounce converter extends the same factor to any kilogram weight.
Troy Ounce vs Avoirdupois Ounce#
A troy ounce is heavier than an avoirdupois ounce: 1 troy ounce equals 1.0971428571 avoirdupois ounces (28.349523125 g), so the troy ounce is 9.71% heavier than the everyday ounce used for food and general retail. That gap is why "1 oz" on a food label and "1 oz" on a bullion invoice are not the same weight.
Why Precious Metals Use the Troy Ounce#
Platinum and the other platinum group metals are conventionally priced per troy ounce, not avoirdupois ounce; DailyPlatinum states "troy ounce" on first use on any page that also gives a gram or kilogram figure. The historical reason precious metals adopted the troy system is not independently confirmed in DailyPlatinum's reference base and is not stated here. For that history and the fuller troy-versus-avoirdupois explainer, see the troy ounce converter.
Troy Ounce, Pennyweight and Troy Pound#
A pennyweight (dwt) is 1.55517384 grams (1/20 troy ounce), and a troy pound is 373.2417216 grams (12 troy ounces), both derived from the same 64.79891 mg grain as the troy ounce.
| Unit | Symbol | Grains | Grams | Troy oz |
|---|---|---|---|---|
| Grain | gr | 1 | 0.06479891 | 0.0020833 |
| Pennyweight | dwt | 24 | 1.55517384 | 0.05 |
| Troy ounce | ozt | 480 | 31.1034768 | 1 |
| Troy pound | lb t | 5,760 | 373.2417216 | 12 |
Each step multiplies the grain count by a fixed factor, so no conversion in the troy system needs rounding.
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Other Weight Converters and Platinum Prices#
DailyPlatinum publishes converters and price pages for other PGM weights and units.
Related Unit Converters#
Related converters cover troy ounces to grams, kilograms to troy ounces and PGM basket and scrap value calculators.
- Troy ounces to grams and avoirdupois ounces.
- Kilograms to troy ounces, for Good Delivery plates.
- PGM basket and scrap value calculators, for converter and jewelry payouts.
Platinum Price by Gram and Ounce#
Platinum (Pt) trades at $55.01 per gram and $1,711.00 per troy ounce, updated 5 Oct 2026, 15:35 UTC. Live prices per gram are available for platinum, palladium, rhodium, iridium, ruthenium and osmium, each with its own live price page below.
| Metal | Price per gram | Price per 10 g | Link |
|---|---|---|---|
| Platinum | $55.01 | $550.10 | platinum price per gram today, platinum price per 10 grams today |
| Palladium | $37.46 | $374.56 | palladium price per gram today, palladium price per 10 grams today |
| Rhodium | $289.36 | $2,893.57 | rhodium price per gram today, rhodium price per 10 grams today |
| Iridium | $262.03 | n/a | iridium price per gram today |
| Ruthenium | $56.26 | n/a | ruthenium price per gram today |
| Osmium | $2,625.91 | n/a | osmium price per gram today |
Grams to Troy Ounces FAQ#
How many grams are in a troy ounce?#
One troy ounce equals 31.1034768 grams exactly, by definition since the 1959 International Yard and Pound Agreement.
Is 1 oz the same as a troy ounce?#
No: a troy ounce (31.1034768 g) is 9.71% heavier than the everyday avoirdupois ounce (28.349523125 g).
How many grams of silver make a troy ounce?#
Silver uses the same troy ounce as platinum, gold and palladium; there is only one troy ounce, not a metal-specific one.
Why is a pound of gold only 12 troy ounces?#
A troy pound contains 12 troy ounces (373.2417216 g) rather than the 16 avoirdupois ounces (453.59237 g) in an everyday pound, because the two systems divide the pound differently.