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Grams to ounces calculator icon showing scale and ounce badge

Grams To Ounces

Grams to Ounces Calculator

Convert grams to ounces and back

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The gram (g) is the base metric unit of mass; the ounce (oz) is an imperial/US customary unit. 1 ounce = 28.3495 grams exactly (avoirdupois ounce, the everyday kitchen/postal unit).

Enter a value in either field below and the other updates automatically.

Grams (g)
Ounces (oz)
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Converted Value
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Grams
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Ounces
Calculation
1 ounce (oz) = 28.3495 grams (g), exact avoirdupois definition.

Recipes, postage, and product labels split between metric grams and imperial ounces depending on the source, this calculator converts between them instantly using the exact avoirdupois ounce definition.

How to use this grams to ounces calculator

  1. Enter a value in the Grams (g) field to see the equivalent in ounces.
  2. Or enter a value in the Ounces (oz) field to see the equivalent in grams, either field updates the other automatically.

What this calculator does

The gram (g) is the base metric unit of mass, and the ounce (oz) is an imperial/US customary unit. This calculator uses the everyday avoirdupois ounce, the standard kitchen and postal unit, where 1 ounce equals exactly 28.3495 grams.

1 ounce (oz) = 28.3495 grams (g), exact avoirdupois definition

Which ounce this calculator uses

There’s more than one “ounce” in common use, this calculator applies the everyday avoirdupois ounce (28.3495 g), the one used in cooking, postal weights, and most product labeling. This is different from the troy ounce (about 31.1 g) used specifically for precious metals like gold and silver, so if you’re converting a precious metal weight, a troy-specific conversion is the correct one instead.

Frequently asked questions

How many grams are in an ounce?

28.3495 grams make up exactly 1 avoirdupois ounce, the standard ounce used in cooking and everyday product labeling.

Is this the same ounce used for gold prices?

No, gold and other precious metals are priced using the troy ounce (about 31.1 g), which is heavier than the avoirdupois ounce (28.3495 g) this calculator uses. Use a troy-specific conversion for precious metals.