Grams to ounces: 1 oz = 28.35 g
Divide grams by 28.35 to get ounces. 100 g is 3.53 oz, and 1 oz is 28.35 g.
Ounces in 100 g
100 g / 28.3495 g per oz = 3.53 oz
1 oz = 28.349523125 g exactly, from NIST SP 811. How we calculate this
From: Grams. Amount: 100 g.
To convert grams to ounces, divide the grams by 28.349523125, the exact weight of one avoirdupois ounce in grams. That ounce is the one on US kitchen scales and food labels. So 100 g is 100 / 28.3495 = 3.53 oz, 250 g is 8.82 oz and a kilogram is 35.27 oz.
Pick the direction under From, type the amount, and the result appears with its working. When the answer reaches 16 ounces or more, the converter also shows it in pounds and ounces, since 16 ounces make a pound.
Quick answer: how do you convert grams to ounces?
Divide the grams by 28.349523125, the exact number of grams in one ounce. So 100 g is 100 / 28.3495 = 3.53 oz, and 250 g is 8.82 oz. To go back, multiply ounces by 28.35: 4 oz is 113.4 g. Sixteen ounces make a pound, which is 453.6 g.
Key takeaways
- Ounces = grams / 28.349523125, and grams = ounces x 28.349523125.
- 1 oz is 28.35 g, 1 lb is 453.59 g, and 1 kg is 35.27 oz or 2 lb 3.3 oz.
- These are ounces of weight. A fluid ounce measures volume, so 8 fl oz of flour does not weigh 8 oz.
- The troy ounce for gold and silver is a different, heavier ounce of 31.10 g, which kitchens do not use.
Worked example: 250 grams to ounces
Take 250 g of sugar for a recipe written in ounces. Divide by the ounce: 250 / 28.349523125 = 8.818 oz, which rounds to 8.82 oz. On a scale that reads in tenths, set it to 8.8 oz.
Now the other way. A US recipe asks for 12 oz of chocolate chips and your scale reads grams. Multiply: 12 x 28.349523125 = 340.19 g, shown as 340.2 g.
Past a pound, pounds and ounces read better. 500 g is 17.64 oz, which is 1 pound plus 1.64 oz, shown as 1 lb 1.6 oz.
How we calculate this
Formula
Ounces = grams / 28.349523125.
100 / 28.349523125 = 3.53 oz.
Your inputs
Amount: 100 g. Ounce: avoirdupois, 28.349523125 g exactly, 1/16 of the 453.59237 g pound (NIST SP 811).
The converter uses one exact factor. The international pound is defined as exactly 0.45359237 kg, and the avoirdupois ounce is 1/16 of it, so 1 oz = 453.59237 / 16 = 28.349523125 g. Grams to ounces divides by that number; ounces to grams multiplies by it. Pounds and ounces come from whole pounds of 16 ounces plus the ounces left over.
Sources
- NIST Special Publication 811, Appendix B.8 (read 10 October 2026). It lists the pound (avoirdupois) at 0.453 592 4 kg and the ounce (avoirdupois) at 28.349 52 g, rounded to seven figures. It also lists the troy ounce at 31.103 48 g and the US fluid ounce at 29.573 53 mL.
- NIST, Handbook 44, Appendix C, General Tables of Units of Measurement, 2026 edition (read 10 October 2026). It gives the avoirdupois pound as 453.592 37 g and 16 ounces to the pound, so the ounce is exactly 28.349 523 125 g.
Limits
The converter works with weight only. It cannot turn grams into fluid ounces, because that needs the food's density: a cup of water weighs 237 g, but a cup of flour weighs 125 g. For volume, use the mL to oz converter; for a cup of a named ingredient, use grams to cups. Results show two decimals for ounces and one for grams, which is finer than most kitchen scales read.
Video: How To Convert Grams To Ounces Explained
Grams to ounces chart
| Grams | Ounces | Pounds and ounces |
|---|---|---|
| 1 g | 0.04 oz | under 1 lb |
| 5 g | 0.18 oz | under 1 lb |
| 10 g | 0.35 oz | under 1 lb |
| 25 g | 0.88 oz | under 1 lb |
| 50 g | 1.76 oz | under 1 lb |
| 100 g | 3.53 oz | under 1 lb |
| 125 g | 4.41 oz | under 1 lb |
| 200 g | 7.05 oz | under 1 lb |
| 250 g | 8.82 oz | under 1 lb |
| 300 g | 10.58 oz | under 1 lb |
| 400 g | 14.11 oz | under 1 lb |
| 454 g | 16.01 oz | 1 lb |
| 500 g | 17.64 oz | 1 lb 1.6 oz |
| 750 g | 26.46 oz | 1 lb 10.5 oz |
| 1,000 g | 35.27 oz | 2 lb 3.3 oz |
Ounces to grams chart
| Ounces | Grams |
|---|---|
| 0.5 oz | 14.2 g |
| 1 oz | 28.3 g |
| 2 oz | 56.7 g |
| 3 oz | 85.0 g |
| 4 oz | 113.4 g |
| 6 oz | 170.1 g |
| 8 oz | 226.8 g |
| 10 oz | 283.5 g |
| 12 oz | 340.2 g |
| 16 oz (1 lb) | 453.6 g |
| 24 oz (1 1/2 lb) | 680.4 g |
| 32 oz (2 lb) | 907.2 g |
How many grams in an ounce?
28.35 g, or 28.349523125 g to the full exact figure. The number is exact because the pound is defined in kilograms: 0.45359237 kg, so a sixteenth of it is 28.349523125 g with no rounding. Rounding to 28 g is fine for a pinch of spice. In baking it adds up: 16 oz at 28 g each would be 448 g, 5.6 g short of a real pound.
Ounces or fluid ounces?
An ounce on a scale is weight; a fluid ounce on a measuring cup is volume. They match only for water and foods with about the same density. A US cup holds 8 fluid ounces, and a cup of water weighs 237 g, which is 8.36 oz. A cup of flour holds the same 8 fluid ounces but weighs 125 g, only 4.41 oz. Our ounces in a cup page covers both kinds, with USDA cup weights.
Troy ounces are a different ounce
Gold, silver and other precious metals are weighed in troy ounces. NIST lists the troy ounce at 31.103 48 g, about 10 percent heavier than the 28.35 g avoirdupois ounce. Recipes, food labels and kitchen scales use the avoirdupois ounce, which is the one this converter uses.
Grams to pounds
A pound is 453.59237 g, so divide grams by 453.59 for pounds. For pounds and ounces both ways, use ounces in a pound. A kilogram is 1,000 / 453.59237 = 2.2046 lb, which is 2 lb 3.3 oz. Half a kilogram, 500 g, is 1.10 lb, or 1 lb 1.6 oz.
Frequently asked questions
How many ounces is 100 grams? 3.53 oz. 100 / 28.349523125 = 3.527.
How many grams is 1 ounce? 28.35 g, exactly 28.349523125 g.
Is 28 grams an ounce? Close but not quite: 28 g is 0.99 oz. An ounce is 28.35 g.
How many ounces are in a kilogram? 35.27 oz, which is 2 lb 3.3 oz.
How many grams are in a pound? 453.59 g, exactly 453.59237 g.
How many ounces is 250 grams? 8.82 oz.
Conclusion
Grams to ounces is one exact division by 28.349523125, and ounces to grams is the same number multiplied. Keep weight and fluid ounces apart, and the conversion holds for every food. For recipes to weigh out, see the TheSawad cookbooks.