Quick answer
What is 1 oz in g?
Formula: grams = ounces x 28.349523125
Use the calculator above for any value, then check the examples, table, and common mistakes below before rounding your final answer.
Use this ounces to grams converter to change an ounce measurement into its gram equivalent. Enter a number in the calculator above and the result updates instantly.
Weight and mass conversions are common for body weight, shipping labels, recipes, gym tracking, lab measurements, and comparing metric and US customary units.
What is an ounce?
An ounce is a US customary and imperial weight unit. It is used for small food quantities, mailing weight, recipes, and precious metals.
What is a gram?
A gram is a metric mass unit equal to one thousandth of a kilogram. It is common in cooking, nutrition labels, medicine, and laboratory work.
Ounces to Grams Converter formula
To convert ounces to grams, use the formula below.
1 oz = 28.349523125 g. This relationship is the conversion factor used by the calculator.
How to convert ounces to grams
Start with the ounce value, apply the formula, and round the result only after the calculation is complete.
Example: 10 oz = 283.49523125 g.
- 1 oz = 28.349523125 g
- 10 oz = 283.49523125 g
- 100 oz = 2,834.9523125 g
Manual conversion steps
- Write down the value in ounces.
- Use the conversion formula: grams = ounces x 28.349523125.
- Calculate the result in grams.
- Round the answer to the number of decimal places you need.
For quick checking, the converter above performs the same calculation automatically.
Common ounces to grams use cases
This conversion is useful in practical situations where measurements need to move between different unit systems or audiences.
- Convert ounces to grams for body weight, shipping weight, food packaging, recipe quantities, and fitness tracking.
- This conversion is helpful when product specifications or labels use a different weight unit than your audience expects.
- Use ounces to grams for recipes, food labels, coffee brewing, supplements, postage, cosmetics, and small ecommerce products.
- Use it when US package weights need to be shown in metric units for international buyers.
- Use it to convert ingredient weights before scaling a recipe or entering nutrition data.
Common mistakes when converting ounces to grams
These are the most common issues to watch for when doing this conversion by hand.
- Do not mix up the direction of the conversion. ounces to grams is not the same as grams to ounces.
- Avoid rounding too early. Keep the full result during the calculation, then round the final answer.
- Do not confuse oz with fl oz. Ounces are weight; fluid ounces are volume.
- Do not round one ounce to 30 grams when precision matters for recipes, nutrition, or shipping.
- Do not convert a volume ounce to grams without knowing the substance density.
Ounces to grams for precise small weights
Ounces are common in US food, retail, and postal contexts. Grams are standard for metric recipes, laboratory notes, nutrition labels, and international product data. This conversion is especially useful for small quantities where rounding can noticeably change the result.
Avoirdupois ounces
This converter uses the common avoirdupois ounce, equal to exactly 28.349523125 grams. It is not the troy ounce used for precious metals, which has a different mass.
Common ounces to grams conversions
| Ounce | Gram |
|---|---|
| 1 oz | 28.349523125 g |
| 2 oz | 56.69904625 g |
| 4 oz | 113.3980925 g |
| 8 oz | 226.796185 g |
| 12 oz | 340.1942775 g |
| 16 oz | 453.59237 g |
| 32 oz | 907.18474 g |
How to convert grams to ounces
To reverse the conversion, switch the two units in the calculator or open the reverse conversion page: grams to ounces.
Reversing the units is useful when you already have a value in grams and need the equivalent value in ounces.
How to use this ounces to grams converter
- Enter the number you want to convert in the value field.
- Confirm that the from unit is Ounce and the to unit is Gram.
- Read the converted result in the result box.
- Use the copy button if you want to paste the answer elsewhere.
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FAQ
What is the formula for ounces to grams?
The formula is: grams = ounces x 28.349523125.
How do I convert ounces to grams by hand?
Write down the value in ounces, apply the formula, and round the final result in grams.
How accurate is this converter?
The converter uses standard conversion factors and shows rounded results for readability.
Can I reverse the conversion?
Yes. Use the swap button in the converter or open the related reverse conversion page.
Why do results sometimes have many decimal places?
Some unit conversions do not produce short decimal values. Keep more decimal places for technical work, and round the answer for everyday use.
How many grams are in 1 ounce?
1 avoirdupois ounce equals exactly 28.349523125 grams.
How many grams are in 8 ounces?
8 ounces equal about 226.796 grams.
Is this converter for troy ounces?
No. This page uses ordinary avoirdupois ounces, not troy ounces.