Converters

Ounces to Grams Converter

Convert ounces to grams instantly. 1 oz = 28.3495 grams.

Enter a value above to see the conversion.

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Ounces to Grams Formula

The conversion from ounces to grams uses a fixed mathematical relationship.

g = oz × 28.3495

Example: 8 oz × 28.3495 = 226.796 g

About the Ounces to Grams Conversion

The avoirdupois ounce (the standard ounce for food, packages, and everyday weights) equals exactly 28.349523125 grams by international definition. This conversion is essential for cooking with international recipes, understanding nutrition labels, and shipping small packages across borders.

Note that the troy ounce — used for precious metals like gold and silver — is different at 31.1035 grams per troy ounce. Always confirm which ounce is intended. For food and general consumer weight, the avoirdupois ounce (28.35 g) is the correct standard.

Frequently asked questions

How many grams is one ounce?
One avoirdupois ounce equals exactly 28.349523125 grams, as defined internationally. For most practical purposes, 28.35 grams per ounce is sufficient precision. This is the standard ounce used for food, packages, and general everyday weight measurements.
How many grams is 8 ounces?
8 ounces equals approximately 226.8 grams (8 × 28.3495 = 226.796). This is a common portion size in American cooking — roughly equivalent to half a pound — and corresponds to about one cup of most thin liquids such as water.
How many ounces is 100 grams?
100 grams equals approximately 3.527 ounces (100 ÷ 28.3495 = 3.527). Nutrition labels in the US often list per-100g values alongside ounce-based serving sizes, making this conversion useful for dietary tracking and comparison.
What is the difference between an ounce and a fluid ounce?
An ounce (oz) measures weight and equals 28.35 grams, while a fluid ounce (fl oz) measures volume. They are entirely different units. One fluid ounce of water happens to weigh approximately one ounce, but this relationship only holds for water and changes for liquids of different densities.
How many grams is 16 ounces, or one pound?
16 ounces (one pound) equals approximately 453.6 grams (16 × 28.3495 = 453.592). This is the standard pound-to-grams conversion factor, since one pound is defined as exactly 453.59237 grams by international agreement.

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