Written by Mustapha B. · Updated August 13, 2026
Convert cups to grams accurately. Cups measure volume and grams measure weight, so the result depends on the ingredient, select yours below for the precise gram amount.
The reason a single “cup to grams” number never works is that a cup measures volume while grams measure weight. A cup of feathery flour holds far less mass than a cup of dense honey, so the only accurate way to convert between volume and weight is to use each ingredient’s density. This converter stores tested densities for dozens of common cooking and baking ingredients, so you get the right number every time.
Volume-to-volume (cups → tablespoons) and weight-to-weight (ounces → grams) conversions are fixed ratios and don’t depend on the ingredient. You only need to pick an ingredient when you cross between the two, for example cups to grams, or ounces to cups.
| Ingredient | 1 cup | ½ cup | ⅓ cup |
|---|---|---|---|
| Flour, all-purpose | 125 g | 63 g | 42 g |
| Flour, bread | 127 g | 64 g | 42 g |
| Sugar, granulated | 200 g | 100 g | 67 g |
| Sugar, brown (packed) | 220 g | 110 g | 73 g |
| Sugar, powdered | 120 g | 60 g | 40 g |
| Butter | 227 g | 114 g | 76 g |
| Cocoa powder | 85 g | 43 g | 28 g |
| Honey | 340 g | 170 g | 113 g |
| Water | 237 g | 119 g | 79 g |
Weights are spooned-and-levelled and based on commonly referenced King Arthur Baking and USDA densities. For the most reliable baking, weigh ingredients with a digital scale.
For all-purpose flour, 1 cup ≈ 125 g. For granulated sugar, 1 cup ≈ 200 g. For butter, 1 cup ≈ 227 g. Pick your ingredient above for the exact figure.
A cup of all-purpose flour is about 125 g when spooned and levelled. Bread flour is similar (~127 g), while cake flour is lighter (~114 g).
Cups measure volume while grams measure weight. Light, airy ingredients like flour weigh far less per cup than dense ones like honey or sugar. Converting accurately requires each ingredient’s density, which this tool stores for 200+ common foods.
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