Ounces to Grams Converter
1 avoirdupois ounce equals exactly 28.349523125 grams, so 8 oz is 226.8 g and 16 oz is 453.59237 g. This converter switches between ounces and grams using the standard weight ounce used for cooking, food labels, and shipping. Use it when a recipe is written in ounces or a carrier asks for grams.
Quick answer
1 avoirdupois ounce is exactly 28.349523125 grams.
Result
226.796185 grams
Unit standard
Avoirdupois weight ounce
Exact rate
1 oz = 28.349523125 g
What this tells you
- •1 avoirdupois ounce is exactly 28.349523125 grams.
- •To convert ounces to grams, multiply by 28.349523125.
- •To convert grams to ounces, divide by 28.349523125.
- •This is the everyday weight ounce, not a fluid ounce and not a troy ounce.
How to Use
- 1Enter the weight you want to convert.
- 2Choose whether the starting value is in ounces or grams.
- 3Choose the unit you want as the result.
- 4Read the converted value below.
How It Works
Formula
g = oz × 28.349523125Multiply ounces by 28.349523125 to get grams because 1 avoirdupois ounce is defined as exactly 28.349523125 g. To go the other way, divide grams by 28.349523125 to get ounces. For example, 4 oz times 28.349523125 is 113.3980925 g.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
Convert 8 oz of chocolate chips to grams
Multiply 8 by 28.349523125 to get 226.796185 grams, which rounds to 226.8 g for most recipes.
Convert a 500 g parcel to ounces
Divide 500 by 28.349523125 to get 17.636981 ounces before your carrier's rounding rules.
Ounces to Grams Conversions
Common kitchen and shipping weights using the exact avoirdupois ounce.
| Ounces | Grams |
|---|---|
| 1 oz | 28.349523125 g |
| 4 oz | 113.3980925 g |
| 8 oz | 226.796185 g |
| 12 oz | 340.1942775 g |
| 16 oz | 453.59237 g |
| 32 oz | 907.18474 g |
| 64 oz | 1,814.36948 g |
These values use the avoirdupois ounce, the standard weight ounce for food, body weight, and shipping in the US.
Common mistakes
- Mixing up ounces of weight with fluid ounces of volume. A fluid ounce measures space, so it cannot be converted to grams without knowing the substance and its density.
- Using the rounded shortcut of 28 g per ounce when you need an exact label or shipping weight. That shortcut is fine for rough kitchen math, but it is not exact.
- Using troy ounces for everyday goods. Troy ounces are for precious metals and are heavier than the standard ounce used here.