Convert ounces to grams in one step. Type a value, see the answer and a few related units, and use the chart below for common values. Free, private, and runs entirely in your browser.
Multiply the number of ounces by the conversion factor to get grams. The units are defined in terms of each other, so the conversion is exact. The calculator uses the full-precision factor, while the factor printed here is rounded.
| Ounces (oz) | Grams (g) |
|---|---|
| 0.5 | 14.1748 |
| 1 | 28.3495 |
| 2 | 56.699 |
| 3 | 85.0486 |
| 4 | 113.3981 |
| 6 | 170.0971 |
| 8 | 226.7962 |
| 12 | 340.1943 |
| 16 | 453.5924 |
| 24 | 680.3886 |
| 32 | 907.1847 |
| 100 | 2,834.9523 |
How many grams is 1 ounce? About 28.35 g.
Is a troy ounce the same? No. A troy ounce is about 31.1035 g and is used for gold, silver and other precious metals.
Convert 8 ounces to grams: 8 × 28.3495 = 226.7962 g.
Is the ounces to grams factor exact? Yes. The units are defined in terms of each other, so the factor has no uncertainty.
Can I convert grams back to ounces? Yes. Use the converter in the opposite direction, which is linked below.
The ounce comes from the Roman uncia, one twelfth of a pound. The avoirdupois ounce used for most goods is one sixteenth of a pound and equals exactly 28.349523125 grams. Precious metals use the troy ounce, which weighs about 31.1035 grams, so the two should not be mixed.
Use this converter for recipes, shipping weights, jewelry and food packaging. An 8 oz portion of steak is 226.8 g, and a 12 oz bag of coffee is 340.2 g. For gold or silver, remember that prices are quoted per troy ounce.
What is a quick estimate for ounces to grams? Multiply or divide by the rounded factor, 28.3495, then use the calculator for the exact value.
Does the converter work on a phone? Yes. It runs in your browser and updates when you press Calculate.