Ounces to Grams

This calculator converts ounces to grams for recipes, parcel weights, and products labeled in imperial units.

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Enter the weight in ounces, including fractions written as decimals, to get the equivalent number of grams.

The formula is: grams = ounces × 28.34952.

Worked example

For 6.5 ounces, calculate 6.5 × 28.34952 = 184.27188 grams. Rounded to two decimal places, that is 184.27 g.

Common questions

Is an ounce always 28 grams?

A standard weight ounce is exactly 28.349523125 grams. Using 28 grams is a quick estimate, but the difference grows with larger amounts.

Can this convert fluid ounces to grams?

No, because fluid ounces measure volume and grams measure mass. You also need the liquid's density to convert between them.

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