The grams to ounces factor
One ounce equals 28.3495 grams, so to convert grams to ounces you divide by 28.3495. For example, 100 g ÷ 28.3495 = 3.53 oz. This is the avoirdupois ounce used for everyday weight (not the troy ounce used for precious metals). Going the other way? Use the ounces to grams calculator.
The factor comes from the pound: one avoirdupois pound is defined as exactly 0.45359237 kg and holds 16 ounces, so one ounce is 453.59237 ÷ 16 = 28.349523125 g. That definition has been identical in the US and the UK since 1959, so the conversion never depends on which country a recipe came from.
How to use this calculator
Enter a weight in grams and the converter instantly shows the equivalent in ounces, rounded to two decimals. It works for recipe ingredients, postage, and product weights alike — just divide grams by 28.3495.
Worked examples: a 340 g tin is 340 ÷ 28.3495 = 11.99 oz, which is why 340 g is the metric equivalent of a 12 oz can. A 1 kg bag is 1000 ÷ 28.3495 = 35.27 oz, or 2 lb 3.3 oz. To convert grams straight to pounds instead, divide by 453.6.
Two ounces exist and they are not interchangeable. The avoirdupois ounce used here is 28.3495 g and covers food, post and shipping. The troy ounce used for gold, silver and platinum is 31.1035 g, about 10% heavier, so treating a price per troy ounce as an ordinary ounce understates it noticeably.
Once that is settled, the kg to lbs calculator takes care of the next part.
Grams to ounces reference table
Common conversions:
| Grams | Ounces |
|---|---|
| 10 g | 0.35 oz |
| 50 g | 1.76 oz |
| 100 g | 3.53 oz |
| 250 g | 8.82 oz |
| 500 g | 17.64 oz |
Anchors worth memorising: 28 g is about 1 oz, 113 g about 4 oz (a quarter pound), 227 g about 8 oz and 454 g is 1 lb. Kitchen scales usually show ounces as a decimal rather than in fractions, so 3.53 oz means three and a half ounces, not three ounces and fifty-three of something. To go the other way, the ounces to grams calculator multiplies instead of dividing.
Frequently asked questions
- How do I convert grams to ounces?
- Divide the grams by 28.3495. For example, 100 g ÷ 28.3495 = 3.53 oz.
- How many grams are in an ounce?
- One avoirdupois ounce equals 28.3495 grams.
- What is 100 grams in ounces?
- 100 grams equals about 3.53 ounces.
- Is this the troy ounce or the regular ounce?
- This uses the avoirdupois ounce (28.3495 g), the standard for food and everyday weight, not the troy ounce.
- Are fluid ounces the same as ounces?
- No. A fluid ounce measures volume and an ounce measures weight, and this calculator converts weight only. They nearly coincide for water, where 1 US fluid ounce weighs about 1.04 oz, but for flour, oil or honey the two numbers are far apart.