Ounces to Grams Converter
Convert avoirdupois ounces (oz) to grams (g) instantly. Enter any weight to see the gram equivalent, reverse value, formula and common ounce-to-gram conversions.
Convert Ounces to Grams
How to Convert Ounces to Grams
To convert ounces to grams, multiply the number of ounces by 28.349523125. This page uses the common avoirdupois ounce, the ounce normally used for everyday weight and mass measurements in the U.S. customary system.
So 1 oz equals 28.349523125 g.
Example: Convert 8 oz to Grams
For an 8-ounce weight:
Therefore, 8 oz is approximately 226.796 g.
Common Ounces to Grams Conversions
| Ounces (oz) | Grams (g) |
|---|---|
| 0.5 oz | 14.1748 g |
| 1 oz | 28.3495 g |
| 2 oz | 56.6990 g |
| 3 oz | 85.0486 g |
| 4 oz | 113.3981 g |
| 5 oz | 141.7476 g |
| 6 oz | 170.0971 g |
| 8 oz | 226.7962 g |
| 10 oz | 283.4952 g |
| 12 oz | 340.1943 g |
| 16 oz | 453.5924 g |
What Is an Ounce?
An ounce, abbreviated oz, is a unit of mass used in the avoirdupois system. The international avoirdupois pound is defined as exactly 0.45359237 kilograms and contains 16 ounces.
From that relationship, one avoirdupois ounce equals exactly 28.349523125 grams.
What Is a Gram?
A gram, abbreviated g, is a metric unit of mass. There are 1,000 grams in one kilogram.
Grams are convenient for relatively small masses and are commonly used for food quantities, product weights, ingredients and many scientific measurements.
Ounces Are Not the Same as Fluid Ounces
This converter handles ounces of mass (oz), not fluid ounces (fl oz). A fluid ounce measures volume. You cannot generally convert fluid ounces directly to grams without also knowing the density of the substance.
For example, “8 oz” on a weight measurement and “8 fl oz” on a liquid volume measurement represent different types of quantities. Always check which unit is shown before converting.
How to Convert Grams Back to Ounces
For the reverse conversion, divide grams by 28.349523125:
You can also use ToolZippy’s dedicated Grams to Ounces Converter for the reverse calculation.
Rounding Ounce-to-Gram Results
The exact conversion factor contains several decimal places, but the amount of precision you need depends on the task. Everyday measurements may only need one or two decimal places, while technical work may require more.
For example, 1 oz can be displayed as 28.35 g for ordinary use even though the full conversion is 28.349523125 g.
How to Use This Converter
- Enter the number of ounces you want to convert.
- Select Convert, or simply type and the result will update automatically.
- Read the converted weight in grams.
- Check the reverse value if you want to confirm the conversion.
- Use Copy Result to copy the conversion.
Decimal values are supported, so you can convert measurements such as 0.5 oz, 1.25 oz or 7.75 oz as well as whole numbers.
Ounces to Grams FAQs
How many grams are in 1 ounce?
One avoirdupois ounce equals exactly 28.349523125 grams.
How do I convert ounces to grams?
Multiply the number of ounces by 28.349523125. For example, 4 oz × 28.349523125 = 113.3980925 g.
How many grams are in 8 ounces?
Eight avoirdupois ounces equal 226.796185 grams, or about 226.8 grams when rounded to one decimal place.
How many grams are in 16 ounces?
Sixteen ounces equal 453.59237 grams. Sixteen avoirdupois ounces also equal one pound.
Are ounces and fluid ounces the same?
No. An ounce (oz) is a unit of mass, while a fluid ounce (fl oz) is a unit of volume. This calculator converts ounces of mass to grams.
Can fluid ounces be converted directly to grams?
Not in general. Converting a volume to a mass requires information about the substance, such as its density.
Can I enter decimal ounces?
Yes. The calculator accepts whole numbers and decimal values such as 0.5, 2.25 or 7.75 ounces.
How do I convert grams back to ounces?
Divide the gram value by 28.349523125, or use ToolZippy’s Grams to Ounces Converter.
Why does the calculator show several decimal places?
Additional decimal places help preserve conversion precision. You can round the result to the number of decimal places appropriate for your use.
Is this ounces to grams converter free?
Yes. ToolZippy’s Ounces to Grams Converter is free to use and does not require account registration.