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Ounces to Grams
One avoirdupois ounce equals exactly 28.349523125 grams. Multiply ounces by that factor for cooking, shipping, and product labels.
1 oz = 28.3495 g
How to use it
- Type a value in ounces. The grams result updates immediately.
- Read the full factor under the result if you need to check the math by hand.
- Use the table for the values people look up most often.
- Open the reverse converter when you already have grams.
Formula
grams = ounces × 28.349523125
The factor is the avoirdupois ounce. Fluid ounces and troy ounces will not match this result.
An 8 ounce package
8 × 28.349523125 = 226.796 grams. Half of that package is 4 ounces, or 113.398 grams.
Eight ounces is 226.796 grams, a common package size that sits just under a half pound. Sixteen ounces is exactly one pound, 453.592 grams. A postage ounce is the same unit. Gold priced per troy ounce cannot be checked with this page, because a troy ounce is heavier.
Common ounces to grams values
| ounces | grams |
|---|---|
| 1 oz | 28.3495 g |
| 4 oz | 113.3981 g |
| 8 oz | 226.7962 g |
| 12 oz | 340.1943 g |
| 16 oz | 453.5924 g |
| 32 oz | 907.1847 g |
Questions
How do I convert ounces to grams?
Use grams = ounces × 28.349523125. The converter applies that factor at full precision and rounds only what it displays.
Is this ounces to grams factor exact?
The factor is the avoirdupois ounce. Fluid ounces and troy ounces will not match this result.
Is 1 ounce 28 grams or 30 grams?
One ounce of weight is 28.349523125 grams. Rounding to 28 grams is close. Rounding to 30 grams is a rough kitchen shortcut and about 6% high.
Does ProHacks store the number I type?
No. The conversion runs in your browser. The value is not uploaded with the calculation.