How many grams are in an ounce?
One avoirdupois ounce equals exactly 28.349523125 grams.
Grams to Ounces Calculator
Convert metric grams and standard avoirdupois ounces.
Convert grams and ounces
Select a direction and enter the mass.
About this converter
How to use Grams to Ounces Calculator, plus the formulas and logic behind the results.
Tool description
The avoirdupois ounce used for everyday mass is defined as exactly 28.349523125 grams.
How to use
- Select the conversion direction.
- Enter the mass.
- Select Calculate.
- Read the converted result.
Formulas & reference
1 oz = 28.349523125 gounces = grams ÷ 28.349523125grams = ounces × 28.349523125
Quick reference
- 1 oz = 28.349523125 g
- ounces = grams ÷ 28.349523125
- grams = ounces × 28.349523125
Calculation logic
Grams are divided by the exact ounce factor, or ounces are multiplied by it.
Results use standard stated conversion factors and may be rounded for display.
Grams to Ounces Calculator FAQ
Common questions about this conversion and how to interpret the result.
How many ounces are in 100 grams?
One hundred grams is about 3.5274 ounces.
Is this a fluid-ounce conversion?
No. These ounces measure mass, not volume.
Does this use troy ounces?
No. It uses standard avoirdupois ounces.
How do I convert ounces to grams?
Multiply ounces by 28.349523125.
Can I use this for food portions?
Yes, when the portion is measured by mass.