Weight converter
Ounces to Grams
Ounces and Grams measure the same quantity in different unit systems. The relationship is 1 oz = 28.349523 g, which gives 28.349523 g per oz. Below you can convert any value, check a worked example and read the full chart.
Formula 1 oz = 28.349523 g
Need the other direction? Grams to Ounces.
How to convert Ounces to Grams
The avoirdupois ounce is one sixteenth of a pound, about 28.35 grams. The gram is one thousandth of a kilogram and is common in cooking and chemistry.
To convert Ounces to Grams, multiply the value in oz by 28.349523. For example, 10 oz × 28.349523 = 283.495231 g. This works because the ratio between the two units is constant for every value in weight.
Worked examples
| oz | g |
|---|---|
| 1 oz | 28.349523 g |
| 2.5 oz | 70.873808 g |
| 5 oz | 141.747616 g |
| 10 oz | 283.495231 g |
| 25 oz | 708.738078 g |
| 50 oz | 1,417.48 g |
| 100 oz | 2,834.95 g |
Reverse conversion
| g | oz |
|---|---|
| 1 g | 0.03527396 oz |
| 5 g | 0.17636981 oz |
| 10 g | 0.35273962 oz |
| 25 g | 0.88184905 oz |
| 50 g | 1.763698 oz |
| 100 g | 3.527396 oz |
When this conversion is useful
This is the calculation you need when you are comparing body weight, shipping weight or a recipe across metric and imperial units. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 oz is 28,349.52 g.
Is the conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
oz to g conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Ounces (oz) | Grams (g) |
|---|---|
| 1 oz | 28.349523 g |
| 2 oz | 56.699046 g |
| 3 oz | 85.048569 g |
| 4 oz | 113.398093 g |
| 5 oz | 141.747616 g |
| 6 oz | 170.097139 g |
| 7 oz | 198.446662 g |
| 8 oz | 226.796185 g |
| 9 oz | 255.145708 g |
| 10 oz | 283.495231 g |
| 11 oz | 311.844754 g |
| 12 oz | 340.194277 g |
| 13 oz | 368.543801 g |
| 14 oz | 396.893324 g |
| 15 oz | 425.242847 g |
| 16 oz | 453.59237 g |
| 17 oz | 481.941893 g |
| 18 oz | 510.291416 g |
| 19 oz | 538.640939 g |
| 20 oz | 566.990463 g |
| 21 oz | 595.339986 g |
| 22 oz | 623.689509 g |
| 23 oz | 652.039032 g |
| 24 oz | 680.388555 g |
| 25 oz | 708.738078 g |
| 26 oz | 737.087601 g |
| 27 oz | 765.437124 g |
| 28 oz | 793.786648 g |
| 29 oz | 822.136171 g |
| 30 oz | 850.485694 g |
| 31 oz | 878.835217 g |
| 32 oz | 907.18474 g |
| 33 oz | 935.534263 g |
| 34 oz | 963.883786 g |
| 35 oz | 992.233309 g |
| 36 oz | 1,020.58 g |
| 37 oz | 1,048.93 g |
| 38 oz | 1,077.28 g |
| 39 oz | 1,105.63 g |
| 40 oz | 1,133.98 g |
| 41 oz | 1,162.33 g |
| 42 oz | 1,190.68 g |
| 43 oz | 1,219.03 g |
| 44 oz | 1,247.38 g |
| 45 oz | 1,275.73 g |
| 46 oz | 1,304.08 g |
| 47 oz | 1,332.43 g |
| 48 oz | 1,360.78 g |
| 49 oz | 1,389.13 g |
| 50 oz | 1,417.48 g |
| 60 oz | 1,700.97 g |
| 70 oz | 1,984.47 g |
| 80 oz | 2,267.96 g |
| 90 oz | 2,551.46 g |
| 100 oz | 2,834.95 g |
Frequently asked questions
How many Grams are in 1 Ounces?
1 oz equals 28.349523 g.
How do I convert Ounces to Grams?
Multiply the oz value by 28.349523. Example: 25 oz = 708.738078 g.
What is 2.5 oz in g?
2.5 oz = 70.873808 g.
Is the oz to g conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.