How to convert ounces to grams
To convert ounces to grams, multiply the ounce value by 28.349523125. This is the conversion factor for the international avoirdupois ounce, which is the ounce commonly used for everyday weight measurements.
Grams = Ounces × 28.349523125 Example: 8 oz × 28.349523125 = 226.80 g For most cooking, baking, and everyday measurements, you can round the conversion factor to 28.35 grams per ounce.
Ounces to grams shortcut
For quick mental math, use 28 g ≈ 1 oz. This gives a useful estimate without needing a calculator. For more precise recipe or measurement conversions, use 28.349523125 g per ounce.
Common ounces to grams conversions
| Ounces | Grams |
|---|---|
| 0.25 oz | 7.09 g |
| 0.5 oz | 14.17 g |
| 1 oz | 28.35 g |
| 2 oz | 56.70 g |
| 3 oz | 85.05 g |
| 4 oz | 113.40 g |
| 5 oz | 141.75 g |
| 6 oz | 170.10 g |
| 8 oz | 226.80 g |
| 10 oz | 283.50 g |
| 12 oz | 340.19 g |
| 16 oz | 453.59 g |
Ounces and grams in cooking
Ounces and grams are both commonly used to measure the weight of food. Grams are common in metric recipes, while ounces are frequently used in US recipes and food packaging.
For example, 4 oz is approximately 113.40 g, while 8 oz is approximately 226.80 g. When a recipe gives ingredients by weight, using a kitchen scale is more reliable than converting the weight into cups or other volume measurements because ingredients have different densities.
Weight ounces vs fluid ounces
A weight ounce (oz) measures mass, while a fluid ounce (fl oz) measures volume. They are different units and cannot generally be converted directly without knowing the density of the substance.
For example, 1 weight ounce is exactly 28.349523125 grams. A US fluid ounce, however, is a volume measurement equal to approximately 29.57 mL. The mass of that volume depends on the ingredient or liquid being measured.
Ounces to grams examples
1 oz to grams: 1 × 28.349523125 = approximately 28.35 g.
4 oz to grams: 4 × 28.349523125 = approximately 113.40 g.
8 oz to grams: 8 × 28.349523125 = approximately 226.80 g.
16 oz to grams: 16 × 28.349523125 = approximately 453.59 g.
Frequently asked questions
How many grams are in 1 ounce?
One avoirdupois ounce is exactly 28.349523125 grams, usually rounded to 28.35 grams.
How do I convert ounces to grams?
Multiply the ounce value by 28.349523125. For example, 8 ounces is approximately 226.80 grams.
How many grams is 4 oz?
4 ounces is approximately 113.40 grams.
How many grams is 8 oz?
8 ounces is approximately 226.80 grams.
Is an ounce the same as a fluid ounce?
No. A weight ounce measures mass, while a fluid ounce measures volume. A fluid ounce cannot generally be converted to grams without knowing the density of the substance.
Convert grams to ounces
Need to convert in the opposite direction? Use our Grams to Ounces converter.
For larger weight conversions, you can also use our Pounds to Ounces converter or Pounds to Kilograms converter.