Ounces to Grams Converter
Enter a weight in ounces from a recipe, food package, kitchen scale, or parcel label. The calculator converts it to grams and also shows larger weights in kilograms and grams.
This page uses ordinary weight ounces (oz), not fluid ounces or troy ounces.
Enter zero or any positive weight. Decimals such as 0.25, 0.5, and 1.5 can represent common fractional-ounce amounts.
Kilograms + remaining grams
0 kg 226.796185 g
Automatic: up to 8 decimals. Results are rounded for display.
Start with a common example
Choose a sample ounce value, then change it to match your recipe, package, or scale reading. These examples are for quick reference and are not standard serving sizes.
Have pounds and ounces?
If the weight is written in pounds and ounces, enter each value separately. For example, a weight of 2 lb 6 oz can be entered directly without converting the pounds first. The ounces field should be less than 16, since 16 oz equals 1 lb.
Choose the right converter
Check the unit written with the original value before choosing a converter.
- Convert grams to ordinary ounces when a recipe, product label, or parcel gives the weight in grams and you need the result in ounces.
- Convert decimal pounds to grams when the weight is written as one pound value, such as 1.5 lb. If it is written as 1 lb 8 oz, use the pounds-and-ounces fields above instead.
- Convert US fluid ounces to milliliters when the source uses fl oz. Fluid ounces measure volume, while grams measure mass, so converting between them requires the density of the substance.
- Explore other weight conversions for kilograms, pounds, milligrams, troy ounces, and other units. Precious metals are commonly measured in troy ounces, which are different from the ordinary ounces used by this calculator.
Ounces to grams for recipes: match your kitchen scale
If a recipe calls for 8 oz and your kitchen scale shows grams, enter 8 to get 226.796185 g. On a scale that measures whole grams, you would normally use 227 g. For smaller amounts, more precision can help. For example, ½ oz ≈ 14.175 g, so a scale that measures to 0.1 g gives a more useful reading than one that shows only whole grams.
The ingredient does not change this conversion. 8 oz by weight has the same mass whether it is flour, cheese, chocolate, or honey. The ingredient only matters when converting between weight and volume, such as ounces to cups or fluid ounces.
Scale the recipe before rounding
If one batch needs 2.5 oz and you are making four batches, multiply first:
2.5 oz × 4 = 10 oz
Then convert the total:
10 oz = 283.49523125 g, or 283.5 g rounded to one decimal place.
If you round each 2.5 oz portion to 71 g first, the total becomes 284 g. To avoid this small difference, keep the original values and round only the final result.
Read food packages and parcel labels accurately
A package labeled 3.5 oz weighs about 99.223 g. That is close to 100 g, but it is not exactly the same. When comparing product sizes, keep the original unit visible so a rounded conversion is not mistaken for the weight printed by the manufacturer.
For a parcel marked 1 lb 8 oz, use the pounds-and-ounces fields above. The calculator combines the values into 24 oz and converts the total to 680.388555 g.
If you are checking a parcel for shipping, weigh the complete package, including the box, envelope, padding, and other packing materials.
This calculator converts the actual weight only. It does not calculate a carrier's billable weight. Shipping companies may use their own rounding and package-size rules when calculating charges.
Common ounces-to-grams values
| Ounces (oz) | Grams (g) | How to read it |
|---|---|---|
| 0.25 | 7.087 | A quarter ounce; keep more precision if the original amount is exact. |
| 0.5 | 14.175 | A half ounce, usually easier to weigh as about 14.2 g. |
| 1 | 28.350 | One ordinary weight ounce-not one fluid ounce. |
| 2 | 56.699 | A small portion or package weight. |
| 3.5 | 99.223 | Close to 100 g, but not exactly the same amount. |
| 4 | 113.398 | The labeled weight of one standard US butter stick. |
| 8 | 226.796 | Half a pound, often seen in recipes and food packages. |
| 16 | 453.592 | Exactly one pound. |
How the calculation and rounding work
To convert ounces to grams, multiply the ounce value by 28.349523125. For example, 8 oz × 28.349523125 = 226.796185 g. This calculator uses the standard avoirdupois ounce. There are exactly 16 avoirdupois ounces in 1 international pound.
Automatic mode shows up to eight decimal places. You can also choose whole grams or display one, two, or three decimal places. If a very small nonzero value would round to zero, the calculator keeps extra digits so the result remains visible.
More decimal places do not make a measurement more accurate. If your kitchen scale measures in 1 g steps, a result such as 226.796185 g is best treated as about 227 g. Keep extra digits only when your original measurement and scale are precise enough to support them.
Common questions about ounces and grams
Is 1 ounce exactly 28 grams?
No. 1 ordinary ounce equals exactly 28.349523125 g. Using 28 g is fine for a quick estimate, but it is slightly low. For recipes, package weights, or other precise conversions, use the full conversion.
Can I convert ounces of any ingredient to grams?
Yes, as long as the ounces refer to weight. 8 oz of flour, cheese, chocolate, or honey all equal 226.796185 g by weight. The ingredient only matters when converting between weight and volume, such as ounces to cups or fluid ounces.
Should I round recipe weights to whole grams?
Whole grams are usually practical when your kitchen scale measures in 1 g steps. For smaller amounts, use one decimal place if your scale supports 0.1 g readings. When scaling a recipe, calculate the full amount first and round the final result once.
How do I convert pounds and ounces to grams?
Enter the pounds and remaining ounces in the fields above. The calculator changes each pound into 16 ounces, adds the remaining ounces, and then converts the total to grams. For example, 1 lb 8 oz = 24 oz = 680.388555 g.
Can I use the gram result as a parcel's shipping weight?
You can use it to convert the parcel's measured weight. Weigh the complete package, including the box, envelope, padding, and other packing materials. Shipping carriers may use their own rounding, package dimensions, or billable-weight rules when calculating the final charge.