Mass ounces are not fluid ounces
This conversion uses avoirdupois ounces of mass. Fluid ounces are units of volume.
Unit converter
Ounces to Grams Converter
Convert ounces to grams instantly. Mass ounces, not fluid ounces. See the formula, worked examples and practical reference values.
How to convert oz to g
This page converts avoirdupois mass ounces to grams. It does not interpret fluid ounces or infer a volume-to-weight relationship for any ingredient.
Formula: g = oz × 28.349523
Reverse formula: oz = g × 0.035274
Worked example
1 oz = 28.349523 g
- = 0.02835 kg
- = 0.0625 lb
- = 0.004464 st
Avoid these errors
Common mistakes
A troy ounce is different
Precious metals commonly use the troy ounce, which is heavier than an avoirdupois ounce.
Useful for: Mass ounces converted to grams for food and packaged goods.
Common oz to g conversions
| ounces | grams |
|---|---|
| 1 oz | 28.349523 g |
| 2 oz | 56.699046 g |
| 4 oz | 113.398093 g |
| 8 oz | 226.796185 g |
| 12 oz | 340.194278 g |
| 16 oz | 453.59237 g |
| 24 oz | 680.388555 g |
| 32 oz | 907.18474 g |
About the units
A ounce is an imperial unit represented by oz. A gram is a metric unit represented by g. Calculations use the same authoritative registry as the full weight converter, retaining full precision until display.
Sources and definitions
NIST — SI units and conversion guidance
Conversion constants come from the shared EzyCalculator unit registry. See how calculations are reviewed and tested.