How many grams in an ounce?
1 oz = 28.35 g
by weight · 100 g = 3.53 oz · 1 lb = 16 oz = 453.6 g
Not fluid ounces: 1 fl oz is a volume of 29.57 mL.
Converter
Common amounts in grams
Other cup standards
Weight conversions use the ingredient table on the methodology page.
One ounce of weight is 28.35 grams; the exact figure is 28.349523125 g. Going the other way, 100 g is 3.53 oz and 1 kilogram is 35.27 oz. These are the avoirdupois ounces on a kitchen scale and on food packages, sixteen to the pound.
Grams and weight ounces measure the same thing, so this conversion is exact for any ingredient. That is the difference from cups and fluid ounces, which measure volume: 100 g of flour and 100 g of honey weigh the same but fill very different amounts of a cup. For that step, use the converter above in dry mode or the grams in a cup chart.
| Ounces | Grams | Pounds |
|---|---|---|
| 1/8 oz | 3.54 | 0.008 |
| 1/4 oz | 7.09 | 0.016 |
| 1/2 oz | 14.17 | 0.031 |
| 1 oz | 28.35 | 0.063 |
| 2 oz | 56.7 | 0.125 |
| 3 oz | 85.05 | 0.188 |
| 3 1/2 oz | 99.22 | 0.219 |
| 4 oz | 113.4 | 0.25 |
| 5 oz | 141.75 | 0.313 |
| 6 oz | 170.1 | 0.375 |
| 8 oz | 226.8 | 0.5 |
| 10 oz | 283.5 | 0.625 |
| 12 oz | 340.19 | 0.75 |
| 14 oz | 396.89 | 0.875 |
| 16 oz | 453.59 | 1 |
| Grams | Ounces | Pounds |
|---|---|---|
| 1 g | 0.04 | 0.002 |
| 5 g | 0.18 | 0.011 |
| 10 g | 0.35 | 0.022 |
| 20 g | 0.71 | 0.044 |
| 25 g | 0.88 | 0.055 |
| 30 g | 1.06 | 0.066 |
| 50 g | 1.76 | 0.11 |
| 100 g | 3.53 | 0.22 |
| 125 g | 4.41 | 0.276 |
| 150 g | 5.29 | 0.331 |
| 200 g | 7.05 | 0.441 |
| 250 g | 8.82 | 0.551 |
| 300 g | 10.58 | 0.661 |
| 400 g | 14.11 | 0.882 |
| 500 g | 17.64 | 1.102 |
| 750 g | 26.46 | 1.653 |
| 1,000 g | 35.27 | 2.205 |
Rounding for the kitchen
Many recipes round 1 oz to 28 g or even 30 g. The 30 g shortcut is about 6% high, which is fine for a sauce but adds up across a whole cake. Most kitchen scales switch between grams and ounces with one button, so you can weigh in whichever unit the recipe uses.
Troy ounces are different
Gold, silver and other precious metals are weighed in troy ounces of about 31.1 g. Food is never sold that way; every ounce on a grocery label is the 28.35 g avoirdupois ounce.
Questions
How many grams in an ounce?
28.35 grams in 1 ounce of weight.
How many ounces is 100 grams?
3.53 oz.
How many grams is 4 oz?
113.4 g, the weight of one US stick of butter.
Is a fluid ounce 28.35 grams?
Only roughly, and only for water: 1 fl oz is a volume of 29.57 mL, and that much water weighs about 29.5 g.
By Alton Vieira · Updated . Sources: US customary units: NIST Handbook 44. How we calculate.