1 ounce = 28.349523 g
1 oz = 28.3495 g · type math like (12*4)+6.5
Ounces to grams is how cooks outside the US make sense of American recipes and packaged food weights. It is also used by people tracking nutrition, since calorie and protein data are reported per 100 g in most countries.
Baking is where precision counts most. American recipes may call for a 1 oz square of chocolate, which is 28.35 g, or a 16 oz bag of chocolate chips, which is 453.6 g. Many European bakers convert these figures to grams and round to the nearest 5 g. That is fine for chocolate, but for yeast or salt, rounding 0.25 oz (7.09 g) to 5 g or 10 g changes the result noticeably.
Nutrition tracking is another major use. Labels outside the US list values per 100 g, while American portion sizes are given in ounces. A 6 oz chicken breast is 170.1 g, so you multiply the per-100 g protein figure by 1.70 to find the protein in that portion.
The jewelry and bullion trades use troy ounces instead. A 1 troy oz silver coin is 31.1 g, almost 3 g heavier than a regular ounce. Postal services, coffee roasters and kitchen scales always mean the regular avoirdupois ounce.
Letter mail and small parcel rates in the US step up in ounce increments. A package of 13 oz is 368.5 g, and a 4 oz envelope is 113.4 g.
Coffee bags in the US are sold in 12 oz sizes, which is 340 g, while European bags are usually 250 g or 500 g.
Cheese is often sold by the ounce at US deli counters. A 4 oz portion is 113.4 g.
To check your work, the gram figure should be about 28 times the ounce figure. 10 oz should be near 280 g (283.5 exactly), and 2 oz near 57 g. If your answer is smaller than the ounce number, you divided by mistake. Remember that recipe ounces mean weight; if the recipe lists fluid ounces of a liquid, convert to milliliters instead, because fluid ounces measure volume.
g = oz × 28.34952313
Reverse: 1 g = 0.035273962 oz.
Convert an 8 oz steak to grams.
Answer: 8 oz = 226.8 g.
| oz | g |
|---|---|
| ¼ oz | 7.0873808 g |
| ½ oz | 14.174762 g |
| ¾ oz | 21.262142 g |
| 1 oz | 28.349523 g |
| 2 oz | 56.699046 g |
| 3 oz | 85.048569 g |
| 4 oz | 113.39809 g |
| 5 oz | 141.74762 g |
| 6 oz | 170.09714 g |
| 7 oz | 198.44666 g |
| 8 oz | 226.79619 g |
| 9 oz | 255.14571 g |
| 10 oz | 283.49523 g |
| 11 oz | 311.84475 g |
| 12 oz | 340.19428 g |
| 13 oz | 368.5438 g |
| oz | g |
|---|---|
| 14 oz | 396.89332 g |
| 15 oz | 425.24285 g |
| 16 oz | 453.59237 g |
| 17 oz | 481.94189 g |
| 18 oz | 510.29142 g |
| 19 oz | 538.64094 g |
| 20 oz | 566.99046 g |
| 25 oz | 708.73808 g |
| 30 oz | 850.48569 g |
| 40 oz | 1 133.9809 g |
| 50 oz | 1 417.4762 g |
| 75 oz | 2 126.2142 g |
| 100 oz | 2 834.9523 g |
| 250 oz | 7 087.3808 g |
| 500 oz | 14 174.762 g |
| 1 000 oz | 28 349.523 g |
An 8 oz steak is 226.8 g; a 16 oz steak is 453.6 g.
A 1.55 oz chocolate bar is 43.9 g.
A 12 oz box is 340.2 g.
A recipe asking for 8 fl oz of milk means volume. That is 237 ml, which weighs about 244 g, not 226.8 g.
Older British cookbooks round to 25 g or 30 g. That is fine for stews but can spoil delicate baking.
A 1 oz silver coin weighs 31.1 g, not 28.35 g.
The avoirdupois ounce is exactly 28.349523125 g, 1/16 of a pound.
Origin. The ounce traces back to the Roman uncia. England adopted the avoirdupois version for general goods by the 14th century.
Used today. US food labels, portion sizes in restaurants, postage and parcel weights.
One gram is 0.001 kg.
Origin. Defined in 1795 from the mass of a cubic centimeter of water.
Used today. Nutrition labels, kitchen scales and pharmacy doses worldwide.
113.4 g.
453.59 g, because 16 × 28.3495 = 453.59.
No. It contains one troy ounce, 31.1035 g, of gold.
Older metric cookbooks used 25 g as a tidy approximation so ingredient ratios stayed round.