Source unit
Ounce oz
Ounce is a unit used to measure mass.
One ounce equals 0.028349523125 kilograms.
Ounce to Gram Converter
Reverse conversion: Gram to OunceResult
Ounce to Gram
Exact1 oz≈28.3495 g
How to convert ounces to grams
Conversion table
Practical and common reference values
| Ounces (oz) | Grams (g) | Copy converted value |
|---|---|---|
| ⅛ (0.125) | ≈ 3.543690391 | |
| ¼ (0.25) | ≈ 7.087380781 | |
| ½ (0.5) | ≈ 14.17476156 | |
| 1 | ≈ 28.34952313 | |
| 2 | 56.69904625 | |
| 4 | 113.3980925 | |
| 8 | 226.796185 | |
| 16 | 453.59237 | |
| 32 | 907.18474 |
About Ounces and Grams
This page converts avoirdupois ounces of mass to metric grams. One avoirdupois ounce equals exactly 28.349523125 grams.
Ounce as the source, Gram as the result
Use this direction when a recipe, package, postal weight, or product mass is supplied in ordinary ounces and a metric label, scale, or specification requires grams.
Result unit
Gram g
Gram is a unit used to measure mass.
One gram equals 0.001 kilograms.
Where ounce-to-gram conversion is useful
Ounce-to-gram conversion supports fractional recipe quantities, packaged goods, light parcels, craft materials, and imported product specifications that must be weighed or recorded using metric units.
A finite exact gram factor
One avoirdupois ounce is exactly 28.349523125 grams. The conversion factor terminates, but the sensible number of displayed grams still depends on the source value and measurement resolution.
Confirm that oz identifies mass
An unqualified oz on an ordinary weight label usually means avoirdupois mass, but fl oz identifies volume and oz t identifies troy mass. Check the source notation before entering the value.
How this conversion is verified
The exact definition of the avoirdupois pound in kilograms, together with sixteen ounces per pound, gives exactly 28.349523125 grams per ounce. The table and live result share that calculation.
Standards used for this conversion
- NIST: Handbook 44, Appendix C: General Tables of UnitsThe avoirdupois ounce and its relationship to SI mass units.
- BIPM: The International System of Units (SI), 9th editionThe SI definition and use of the kilogram and gram.
- NIST: Writing with SI (Metric System) UnitsAppropriate rounding of converted measurements.
For a quick check, one ounce is about 28.35 grams and one half ounce is about 14.17 grams. Keep the exact result when tolerance matters.
Ounces and grams both measure mass. Converting a fluid-ounce ingredient to grams additionally requires the ingredient density and the correct fluid-ounce system.
Frequently asked questions
6 answers for this conversion
- How do I convert ounces to grams?
- Multiply the avoirdupois-ounce value by exactly 28.349523125. For example, 2 ounces equals exactly 56.69904625 grams.
- How many grams are in one ounce?
- One avoirdupois ounce equals exactly 28.349523125 grams.
- How many grams are in half an ounce?
- One half avoirdupois ounce equals exactly 14.1747615625 grams before any task-specific rounding.
- Can I convert a fluid ounce to grams with this page?
- No. A fluid ounce is volume. Converting it to grams requires the substance density and the applicable US or imperial fluid-ounce definition.
- Which ounce does oz mean on this converter?
- It means the avoirdupois ounce used for ordinary mass. Troy Ounce is available as a separate mass unit, and fluid ounces belong to volume.
- Why might a scale show fewer gram digits?
- A scale reports only to its resolution. Round the converted result to that resolution rather than implying precision the measurement device cannot provide.
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