Convert ounces to grams, both ways.
Type weight ounces and read the exact grams, or type grams to convert back to ounces. The result updates live, with kilograms and pounds for context and a one-click copy. This is weight, not fluid ounces.
Your value
Edit either box. The formula is grams = ounces times 28.3495, and ounces = grams divided by 28.3495. These are avoirdupois (weight) ounces, not fluid ounces.
113.398 gWhat this means
Common ounces to grams values
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How the conversion works
Conversion Factor
1 ounce equals 28.3495 grams (avoirdupois). 1 oz is approximately the weight of a slice of bread or a CD case. The avoirdupois ounce is the standard US/UK ounce, not to be confused with the troy ounce (31.1 g) used for precious metals.
Where You'll Use This
US recipes use ounces; European recipes use grams. Converting is essential for international baking, fitness macro tracking (US labels in oz, European in g), and shipping weight calculations.
Common Reference Values
1 oz = 28.35 g (a slice of bread). 4 oz = 113.4 g (half stick of butter). 8 oz = 226.8 g (a small can). 16 oz = 453.6 g (1 lb).
Common questions
How many grams is 1 ounce?
1 avoirdupois ounce equals 28.35 grams. 1 troy ounce (precious metals) equals 31.10 grams, use the correct type.
What's a troy ounce vs avoirdupois?
Avoirdupois (28.35 g) is used for food, body weight, mail. Troy (31.10 g) is used for gold, silver, gems.
How heavy is a US fluid ounce of water?
1 US fluid oz of water weighs about 1.04 avoirdupois oz (29.57 g). Volume and weight oz are different units that happen to share a name.
All conversion runs in your browser. Nothing is uploaded. This tool uses the avoirdupois ounce (28.3495 g), the standard ounce for food, body weight and mail. Precious metals use the troy ounce, which is heavier at about 31.1035 g.