Ounces to Grams (oz to g) Converter and Formula
1 ounce equals 28.349523 grams — multiply the number of ounces by 28.349523 to convert. This is the international avoirdupois ounce, defined as exactly 28.349523125 grams, which is the ounce used for food, mail and everyday weight in the US and UK.
The formula
To convert ounces to grams, multiply by 28.349523:
g = oz × 28.349523
For example, 4 oz of flour is 4 × 28.349523 = 113.398092 g. To reverse it, divide by 28.349523 (or multiply by 0.03527396).
Conversion table
| Ounces (oz) | Grams (g) |
|---|---|
| 1 | 28.349523 |
| 2 | 56.699046 |
| 5 | 141.747616 |
| 10 | 283.495231 |
| 25 | 708.738078 |
| 50 | 1417.476156 |
| 100 | 2834.952313 |
| 250 | 7087.380781 |
| 500 | 14174.761563 |
| 1000 | 28349.523125 |
How to convert online
- Type the number of ounces into the first box.
- Read the equivalent value in grams instantly in the second box.
- Or enter a gram value to convert back to ounces — it works both ways.
Use the Ounce to Gram Converter — free and instant in your browser.
Where this conversion is used
Ounce-to-gram conversion is essential in the kitchen, where US recipes list ounces but scales and European recipes use grams. It also matters for postage and parcel weights, portion control in nutrition, and small-batch measurements in science and craft work. Some everyday reference points help: a standard US stick of butter is 4 oz (about 113 g), a typical burger patty is 4 oz or 6 oz (roughly 113 g or 170 g), and a 16 oz pint of berries weighs close to 454 g. Note that the fluid ounce is a measure of volume, not weight, so this converter applies only to the avoirdupois weight ounce; for liquids you need a volume converter instead. The tool below keeps full precision so scaled-up recipes and lab quantities stay accurate.
FAQ
How many grams are in an ounce?
One ounce equals 28.349523 grams. Multiply the ounce value by 28.349523, so 10 oz = 283.495231 g.
What is the formula to convert ounces to grams?
g = oz × 28.349523. For example, 5 oz = 141.747616 g and 100 oz = 2834.952313 g.
How do I convert grams back to ounces?
Divide the gram value by 28.349523, or multiply by 0.03527396. So 283.495231 g = 10 oz.
Is the conversion exact?
Yes. The avoirdupois ounce is defined as exactly 28.349523125 g, so the conversion is precise.
Related converters
- Gram to Ounce Converter
- Ounce to Milligram Converter
- Ounce to Kilogram Converter
- Ounce to Pound Converter
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Recommended reading
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