Ounces to Grams Converter
Type ounces to get grams. One ounce is exactly 28.349523125 g, so 8 oz is about 227 g.
8 oz =
226.796g
8 ounces is 226.796 grams.
- 1 oz
- 28.3495 g
- 1 g
- 0.03527 oz
How to convert ounces to grams
Multiply the ounces by 28.349523125. The avoirdupois ounce is legally one sixteenth of the pound, and the pound is fixed in kilograms, so this factor is exact and the answer has no conversion error.
A 6 oz steak is 6 × 28.3495 = 170.1 g. A 14 oz can of tomatoes holds 396.9 g of contents, usually printed on the label as 397 g or 400 g. For a recipe that lists ¾ oz of cheese, the result is 21.3 g.
When a US recipe gives weights in pounds and ounces, convert the pounds first (1 lb = 453.59 g), then add the ounces. For 1 lb 4 oz: 453.59 + 113.40 = 566.99 g.
grams = ounces × 28.349523125
- The ounce on US food labels is the avoirdupois ounce: exactly 28.349523125 g. FDA labelling rules round it to 28 g for serving sizes. Source: 21 CFR 101.9(b)(5), FDA nutrition labelling.
How to estimate ounces to grams in your head
Multiply by 30 and take away a little. 6 oz × 30 = 180, and trimming about 5% gives 171, very close to the exact 170.1 g. Multiplying by 28 is nearer still: 6 × 28 = 168.
Kitchen scales in metric countries step in whole grams, so rounding any answer to the nearest gram is fine. Remember that 4 oz is about 113 g and 8 oz about 227 g, and you can build most recipe amounts from those two.
Ounces to grams chart
Fractions of an ounce up to two pounds, as found in US recipes and on packaging.
| Ounces (oz) | Grams (g) | Example |
|---|---|---|
| 0.25 | 7.0874 | |
| 0.5 | 14.1748 | |
| 1 | 28.3495 | |
| 2 | 56.699 | |
| 3 | 85.0486 | |
| 4 | 113.398 | a quarter-pound burger patty (raw) |
| 5 | 141.748 | |
| 6 | 170.097 | |
| 10 | 283.495 | |
| 12 | 340.194 |
Show all 15 rowsShow fewer
| 14 | 396.893 | |
| 16 | 453.592 | one pound |
| 20 | 566.99 | |
| 24 | 680.389 | |
| 32 | 907.185 | two pounds |
Frequently Asked Questions
How many grams is 8 ounces?
8 oz is 226.8 g, half of a 453.6 g pound. A US stick of butter is 4 oz, so two sticks make 8 oz.
Why does my package say 28 g per ounce?
For nutrition labels the FDA allows 1 oz to be written as 28 g. The exact figure is 28.3495 g, so over a full pound the shortcut drifts by about 5.6 g.
Can I use this for fluid ounces of milk or water?
Only roughly. Fluid ounces measure volume. One US fluid ounce of water weighs about 29.5 g, slightly more than the 28.35 g weight ounce. For liquids use the oz to mL converter instead.