Cups to Grams Converter
Cups measure volume; grams measure weight. Because every ingredient has a different density, one cup of flour and one cup of sugar weigh very different amounts. Use the converter below, or scroll for the chart.
How many grams in a cup?
There is no single answer — it depends on the ingredient. For the most common baking ingredients:
| Ingredient | 1 cup | 1/2 cup | 1/3 cup | 1/4 cup |
|---|---|---|---|---|
| All-purpose flour | 125 g | 63 g | 42 g | 31 g |
| Bread flour | 127 g | 64 g | 42 g | 32 g |
| Cake flour | 114 g | 57 g | 38 g | 29 g |
| Granulated sugar | 200 g | 100 g | 67 g | 50 g |
| Brown sugar (packed) | 213 g | 107 g | 71 g | 53 g |
| Butter | 227 g | 113 g | 76 g | 57 g |
| Cocoa powder | 85 g | 43 g | 28 g | 21 g |
| Rolled oats | 90 g | 45 g | 30 g | 23 g |
| Honey | 340 g | 170 g | 113 g | 85 g |
Why weigh instead of scoop?
Scooping flour straight from the bag can pack in up to 20% more than the recipe intended — which is the difference between a tender cake and a dry one. A kitchen scale removes the guesswork: every cup-of-flour measure becomes a consistent 125 g.
Common questions
- 1 cup of flour in grams: about 125 g (all-purpose).
- 1 cup of sugar in grams: 200 g granulated, 213 g packed brown.
- 1 cup of butter in grams: 227 g, which is two US sticks.
- 1 cup of water in grams: 236 g (water is the reference density).
These figures use US customary cups (236 ml). A UK or Australian cup is 250 ml, so values are about 6% higher.
Sources & method
Ingredient weights follow the standard reference chart used by King Arthur Baking (1 US cup of all-purpose flour = 125 g) and the US customary cup of 236.588 ml. Measurement guidance is based on the NIST culinary measurement tips. Amounts are rounded to the nearest gram, and to the nearest 1/8 for cup, tablespoon and teaspoon measures.