Convert ounces to grams (and grams back to ounces) for any recipe, parcel or project. Switch between everyday avoirdupois ounces and troy ounces (gold and silver), choose your decimal precision, and see the result update instantly.
Created by
Daniel Whitman
Reviewed by
Hannah Brooks
Quick rule: 1 oz ≈ 28.35 g (avoirdupois) and 1 troy oz ≈ 31.10 g.
Votes are stored on your device. Help others find this tool — share, embed, or cite it.
By international agreement (1959), one avoirdupois ounce is defined as exactly 28.349523125 grams. To convert ounces to grams, the calculator multiplies your input by this factor; to go the other way it divides grams by the same number. A handy mental rule: 1 oz ≈ 28.35 g and 100 g ≈ 3.5 oz.
A troy ounce is a different unit, used almost exclusively for precious metals such as gold, silver and platinum. One troy ounce equals exactly 31.1034768 grams — about 10% heavier than a regular ounce. If you're weighing food, body weight or postage, pick avoirdupois; if you're weighing bullion or jewellery, pick troy.
Quick-glance charts for the most common conversions plus the official definitions of every ounce and weight unit.
| Ounces | Grams | Kilograms |
|---|---|---|
| 0.25 oz | 7.087 | 0.0071 |
| 0.5 oz | 14.175 | 0.0142 |
| 1 oz | 28.35 | 0.0283 |
| 2 oz | 56.699 | 0.0567 |
| 3 oz | 85.049 | 0.085 |
| 4 oz | 113.398 | 0.1134 |
| 5 oz | 141.748 | 0.1417 |
| 6 oz | 170.097 | 0.1701 |
| 8 oz | 226.796 | 0.2268 |
| 10 oz | 283.495 | 0.2835 |
| 12 oz | 340.194 | 0.3402 |
| 16 oz | 453.592 | 0.4536 |
| 20 oz | 566.99 | 0.567 |
| 24 oz | 680.389 | 0.6804 |
| 32 oz | 907.185 | 0.9072 |
| Grams | Ounces | Pounds |
|---|---|---|
| 10 g | 0.353 | 0.022 |
| 25 g | 0.882 | 0.0551 |
| 50 g | 1.764 | 0.1102 |
| 100 g | 3.527 | 0.2205 |
| 150 g | 5.291 | 0.3307 |
| 200 g | 7.055 | 0.4409 |
| 250 g | 8.818 | 0.5512 |
| 300 g | 10.582 | 0.6614 |
| 400 g | 14.11 | 0.8818 |
| 500 g | 17.637 | 1.1023 |
| 750 g | 26.455 | 1.6535 |
| 1000 g | 35.274 | 2.2046 |
| Troy oz | Grams | Avoirdupois oz |
|---|---|---|
| 0.1 oz t | 3.11 | 0.1097 |
| 0.25 oz t | 7.776 | 0.2743 |
| 0.5 oz t | 15.552 | 0.5486 |
| 1 oz t | 31.103 | 1.0971 |
| 2 oz t | 62.207 | 2.1943 |
| 5 oz t | 155.517 | 5.4857 |
| 10 oz t | 311.035 | 10.9714 |
| 20 oz t | 622.07 | 21.9429 |
| 50 oz t | 1,555.17 | 54.8571 |
| 100 oz t | 3,110.35 | 109.714 |
| Unit | Grams | Notes |
|---|---|---|
| Avoirdupois ounce (oz) | 28.349523 | Everyday ounce — food, body weight, postage |
| Troy ounce (oz t) | 31.103477 | Used for gold, silver and other precious metals |
| US pound (lb) | 453.59237 | 16 avoirdupois ounces |
| Kilogram (kg) | 1,000 | ≈ 35.274 avoirdupois ounces |
Comments are stored locally in your browser. Be kind and stay on topic.
