Convert ounces to grams
Enter any value to calculate the result instantly.
ounces to grams formula
Multiply avoirdupois ounces by exactly 28.349523125. Sixteen ounces make one international pound.
Conversion table
Use these reference values for a quick comparison. The calculator above accepts positive, negative, decimal, and large values when they are meaningful for the quantity.
| ounces | grams |
|---|---|
| 1 oz | 28.34952313 g |
| 2 oz | 56.69904625 g |
| 4 oz | 113.3980925 g |
| 8 oz | 226.796185 g |
| 12 oz | 340.1942775 g |
| 16 oz | 453.59237 g |
How to use this converter
Enter the source measurement in the first field. CalUnit applies the displayed formula and updates the destination value immediately. You can use decimals and negative values, copy the result into your work, and compare it with the reference table. Keep the original unit beside the starting measurement so another reader can verify the calculation. For a different unit pair, open the complete weight conversion guide or the multi-unit weight converter.
When this conversion is useful
Recipe ounces may describe weight or fluid volume. This calculator converts weight ounces; fluid ounces require a volume conversion, and ingredients need density for volume-to-mass conversion.
Accuracy and rounding
Confirm that the source means avoirdupois ounces, not troy ounces or fluid ounces. Kitchen scales commonly justify rounding to the nearest gram.
Standards references
CalUnit checks physical unit relationships against authoritative measurement references. See the NIST Guide to the SI conversion factors and the BIPM SI Brochure. Regional cooking measures and digital storage conventions are identified separately because their names can represent more than one definition.