Ounces to Grams Converter (oz to g)
1 oz = 28.349523125 g. Turn ounces from US recipes, can labels and deli orders into grams, with charts for common oz and gram amounts.
g = oz × 28.349523125
Ounce (oz): The avoirdupois ounce is 1/16 of a pound, exactly 28.349523125 grams. It is the everyday ounce for food and parcels in the US; precious metals use the heavier troy ounce.
Gram (g): The gram is one thousandth of a kilogram, the SI base unit of mass. It is used worldwide for food, postage and small quantities of almost anything.
| Ounce (oz) | Gram (g) |
|---|---|
| 1 | 28.349523125 |
| 5 | 141.747615625 |
| 10 | 283.49523125 |
| 25 | 708.738078125 |
| 50 | 1417.47615625 |
| 100 | 2834.9523125 |
American recipes, nutrition labels and supermarket packs give solid food in ounces, while a digital kitchen scale set to metric, and almost every recipe written outside the US, works in grams. The ounce meant here is the avoirdupois ounce, one sixteenth of a pound, which comes to exactly 28.349523125 g under the 1959 definition of the pound.
Most US food packages already print the net weight in both units, rounded, so this converter is most useful for recipes and deli counters that quote ounces alone. A fluid ounce on a measuring cup is a volume, not a weight; for liquids use the mL to fl oz converter instead.
How to use this tool
- Type a value in the Ounce box to see it in grams, or type in the Gram box to convert the other way.
- Press ⇄ to swap the two units, or Load example for a typical value.
- Check the charts below for common values; for other units, open the Weight & Mass converter.
Formula
g = oz × 28.349523125
oz = g ÷ 28.349523125
Both factors come from exact definitions: 1 gram = 0.0352739619496 ounces and 1 ounce = 28.349523125 grams (shown to 12 significant digits).
Example
Two conversions worked with the same factors the converter uses:
8 oz × 28.349523125 ≈ 226.796 g
500 g × 0.0352739619496 ≈ 17.637 oz
Ounce to Gram chart
Common values from ounces to grams, rounded to four decimal places.
| Ounce (oz) | Gram (g) |
|---|---|
| 0.25 | 7.0874 |
| 0.75 | 21.2621 |
| 1 | 28.3495 |
| 1.5 | 42.5243 |
| 2 | 56.699 |
| 3 | 85.0486 |
| 3.5 | 99.2233 |
| 4 | 113.3981 |
| 5 | 141.7476 |
| 7 | 198.4467 |
| 8 | 226.7962 |
| 9 | 255.1457 |
| 10 | 283.4952 |
| 11 | 311.8448 |
| 12 | 340.1943 |
| 13 | 368.5438 |
| 14 | 396.8933 |
| 15 | 425.2428 |
| 16 | 453.5924 |
| 18 | 510.2914 |
| 20 | 566.9905 |
| 22 | 623.6895 |
| 24 | 680.3886 |
| 28 | 793.7866 |
Gram to Ounce chart
The reverse direction for values people often look up.
| Gram (g) | Ounce (oz) |
|---|---|
| 10 | 0.3527 |
| 45 | 1.5873 |
| 85 | 2.9983 |
| 113 | 3.986 |
| 140 | 4.9384 |
| 170 | 5.9966 |
| 225 | 7.9366 |
| 340 | 11.9931 |
| 454 | 16.0144 |
| 500 | 17.637 |
| 680 | 23.9863 |
| 1,000 | 35.274 |
US groceries sold by the ounce
| Item | Ounce (oz) | Gram (g) |
|---|---|---|
| Stick of butter | 4 | 113.3981 |
| Can of tuna, common size | 5 | 141.7476 |
| Brick of cream cheese | 8 | 226.7962 |
| Bag of ground coffee, common size | 12 | 340.1943 |
| Can of sweetened condensed milk | 14 | 396.8933 |
| Can of pumpkin purée, smaller size | 15 | 425.2428 |
| Box of dried spaghetti | 16 | 453.5924 |
Quick mental estimate
Think in blocks of 3 oz, each worth almost exactly 85 g: 12 oz → 4 × 85 = 340 g. The block shortcut runs about 0.06% below the exact value, far closer than calling an ounce 28 g.
Use the converter or the charts when the exact figure matters.
The two units
Ounce (oz): The avoirdupois ounce is 1/16 of a pound, exactly 28.349523125 grams. It is the everyday ounce for food and parcels in the US; precious metals use the heavier troy ounce.
Gram (g): The gram is one thousandth of a kilogram, the SI base unit of mass. It is used worldwide for food, postage and small quantities of almost anything.
Frequently asked questions
How many grams is 4 ounces?
4 oz is 113.398 g, usually rounded to 113 g. That is the weight of one US stick of butter, whose wrapper is marked off in 8 tablespoons.
Why does a can say 15 oz on one line and 425 g on the next?
US labeling rules call for the net quantity in both ounces and metric units. 15 oz works out to 425.24 g, and the label shows the gram figure rounded to a whole number.
Should flour in a US recipe be weighed if it is given in ounces?
Yes. An ounce of flour in a recipe is a weight, so put the bowl on a scale and weigh out the grams shown here. Spooning flour into a cup gives a volume, and the same cup can hold noticeably different weights depending on how it is filled.
How precise is the result?
The converter uses the exact definitions above with browser floating-point arithmetic and shows up to 12 significant digits. The charts round to four decimal places for reading.
Sources
Last updated:
Page address with these inputs: https://kakao.mobile/tools/ounce-to-gram-converter/
Cite or embed this tool
kakaoCalc. (2026, November 8). Ounces to Grams Converter (oz to g). https://kakao.mobile/tools/ounce-to-gram-converter/
“Ounces to Grams Converter (oz to g).” kakaoCalc, 8 Nov. 2026, kakao.mobile/tools/ounce-to-gram-converter/.
Paste this code into your page. The widget runs in your visitors' browsers, shows no ads and keeps a link back to this page. Embedding terms