Weight conversion
Ounce to Gram converter
Convert oz to g instantly, choose the displayed precision, and verify the result with the formula and reference table below.
Gram (g)
Rounded for display only; calculations retain full precision.
Rounding and precision rules
- Convr calculates first and rounds the displayed result only once, at the final step.
- The default is a maximum of 6 decimal places; trailing zeros are removed.
- Very small values that would appear as zero, and values of 10¹² or more, use scientific notation.
- Display precision is not measurement uncertainty. For scientific, engineering, or regulated work, retain only the digits justified by the source measurement.
Practical context
Understanding this conversion
Ounces are widely found in American ingredient quantities, postal weights, and retail packages. Grams provide a metric value suited to scales, nutrition calculations, laboratory work, and international labeling.
Confirm that the source means an ounce of mass rather than a fluid ounce of volume. The same word appears in both unit names, but the measurements are not interchangeable.
Reviewed August 16, 2026.
Calculation
Ounce to Gram formula
g = oz × 28.349523
Calculations retain full precision and the result is rounded only for display.
Worked example
For 10 oz, the result is 283.495231 g. Substitute 10 oz into the formula to obtain 283.495231 g.
A numerical value expressed in gram is usually larger than the same measurement expressed in ounce, because 1 oz equals 28.349523 g.
Ounce to Gram reference table
Common values rounded to a maximum of 6 decimal places.
| Ounce (oz) | Gram (g) |
|---|---|
| 1 oz | 28.349523 g |
| 5 oz | 141.747616 g |
| 10 oz | 283.495231 g |
| 50 oz | 1,417.476156 g |
| 100 oz | 2,834.952313 g |
Understanding the units
About Ounce and Gram
Ounce (oz)
One ounce (oz) equals 0.028349523 kg, the base relationship used for this weight conversion.
Gram (g)
One gram (g) equals 0.001 kg, the base relationship used for this weight conversion.
When this conversion is useful
Ounce to Gram conversion is useful for shipping, recipes, product specifications, laboratory work, and body-weight records. It lets you compare the same mass or weight across documents, tools, or standards that use different units.
Learn with Convr
Conversion guides
Metric vs Imperial Units: A Practical Comparison
Understand how metric, US customary, and Imperial units differ, where each system is used, and how to convert between them reliably.
Read guide →FoundationsSignificant Figures and Rounding in Unit Conversions
Learn when to round conversion results, how significant figures preserve measurement meaning, and why more decimals do not guarantee more accuracy.
Read guide →Answers at a glance
Frequently asked questions
Is one ounce exactly 28.35 grams?
One avoirdupois ounce is exactly 28.349523125 grams. The value 28.35 grams is a practical two-decimal approximation.
Are fluid ounces converted to grams the same way?
No. A fluid ounce measures volume, while a gram measures mass. Converting between them requires the density of the substance.
How does Convr round Ounce to Gram results?
Convr keeps full numeric precision during the calculation and rounds only the displayed result. The default is a maximum of 6 decimal places, with selectable precision on this page.
Can I convert negative or decimal ounce values?
Yes. The converter accepts positive, negative, decimal, and scientific-notation values. Negative values are physically meaningful for some scales, such as temperature, but not for every measured quantity.
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