Convert Ounces to Grams
Convert cups, tablespoons, teaspoons, milliliters, grams and ounces with real ingredient densities — because a cup of flour does not weigh a cup of sugar.
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About this tool
This page opens the cooking converter preset to ounces → grams. Unlike cups and tablespoons, this is a weight-to-weight conversion, so no ingredient density is involved: one avoirdupois ounce is exactly 28.349523 g (rounded to 28.3495 g here), and grams = ounces × 28.3495 for any ingredient whatsoever.
Useful anchors for reading recipes: 1 oz is about 28.3 g, 4 oz is 113.4 g (the classic quarter-pound), 8 oz is 226.8 g and 16 oz — one pound — is 453.6 g. A recipe calling for 6 oz of chocolate wants about 170 g; a 3.5 oz bar is your familiar 100 g.
Watch out for the fluid ounce trap: "fl oz" measures volume (about 29.57 ml in the US), not weight, and for dense or airy ingredients the two diverge quickly. If your recipe says fluid ounces of a liquid, convert via milliliters instead; if it says plain ounces of butter, sugar or meat, this weight conversion is the right one. Enter the ounces, press Convert, and copy the gram value straight into your shopping list.
Example. 1 cup of flour, using 240 ml per cup and a density of 0.53 g/ml, converts to 127.2 g.
Limit. Each ingredient has one fixed density, so sifted or packed flour is not a separate factor.