Grams to Ounces Converter (g to oz)
Convert grams and avoirdupois ounces using the exact international avoirdupois ounce definition.
How it works
Grams ÷ 28.349523125 = ounces. Ounces × 28.349523125 = grams.
Formula / calculation method
ounces = grams ÷ 28.349523125grams = ounces × 28.349523125
Worked examples
- 28.349523125 g equals exactly 1 avoirdupois ounce.
- 30 g, a common small food portion, is approximately 1.05822 oz.
- 100 g is approximately 3.52740 oz.
- 250 g is approximately 8.81849 oz.
When this tool helps
Useful for food portions, recipes, packages, shipping, product specifications, nutrition references, and metric–US customary weight conversion.
Related calculations: kilograms to pounds and ounces to pounds.
Browse this topic: Weight & Mass Converters · Mass & Weight Standards Guide.
Quick reference
| Input | Result |
|---|---|
| 28.349523125 g | 1 oz |
| 100 g | 3.52740 oz |
| 8 oz | 226.79619 g |
Accuracy and definitions
This tool uses the avoirdupois ounce used for everyday mass. It does not use the troy ounce used in precious-metal contexts.
Reference standards
Where a published measurement definition applies, Solveberry links to primary standards rather than relying only on secondary converter sites.
- NIST Guide to the SI — Appendix B.8 conversion factors
- BIPM SI Brochure — International System of Units
Methodology & verification
- Method
- Grams ÷ 28.349523125 = ounces. Ounces × 28.349523125 = grams.
- Verification
- The displayed formula is cross-checked against Solveberry regression cases before release. Calculator inputs and results stay in the browser.
- Last reviewed
- 2026-08-19
Results are calculated locally in your browser. Optional analytics do not include calculator input values or results.
Common questions
Is this a troy-ounce converter?
No. It uses the everyday avoirdupois ounce.
How many grams are in one ounce?
Exactly 28.349523125 grams for the international avoirdupois ounce.
Can I convert in the opposite direction on this page?
Yes. Use the “Convert from” selector or Swap units button; Solveberry keeps both directions on one canonical page.
Why can my result differ slightly from another converter?
Differences usually come from rounding or from selecting a different regional measurement standard. Solveberry shows the factor or standard used on the page.