How Many Grams in a Cup?
One US cup (236.6 ml) of all-purpose flour weighs about 125 g, granulated sugar about 200 g and butter about 227 g. A cup measures volume, not weight, so the number of grams depends on how dense the ingredient is.
Grams per US cup
| Ingredient | 1 cup | 1 tablespoon |
|---|---|---|
| Water | 237 g | 14.8 g |
| Milk | 244 g | 15.2 g |
| All-purpose flour | 125 g | 7.8 g |
| Granulated sugar | 200 g | 12.5 g |
| Brown sugar (packed) | 220 g | 13.8 g |
| Butter | 227 g | 14.2 g |
| Rice (uncooked) | 186 g | 11.6 g |
| Rolled oats | 90 g | 5.6 g |
| Honey | 336 g | 21 g |
These are typical averages used in US baking charts. Brands and how you fill the cup change the real weight by a few percent.
US, metric and UK cups
- US cup: 236.6 ml
- Metric cup (Australia, Canada and many recipe sites): 250 ml
- 1 tablespoon = 3 teaspoons = 14.8 ml (US)
Convert any amount
In Convela, open Cooking, pick the ingredient, and type the cups. Grams, ounces, tablespoons and milliliters appear at once, and you can pin cups → grams to the first screen.
FAQ
Is 1 cup always 240 ml?
No. A US cup is 236.6 ml, a metric cup is 250 ml and a UK cup is often 284 ml. Recipes from different countries use different cups.
Why does a cup of flour weigh less than a cup of sugar?
Flour is light and airy, about 0.53 g per ml, while granulated sugar is about 0.85 g per ml. Same volume, different weight.
How do I measure flour without a scale?
Spoon the flour into the cup and level it with a knife. Scooping straight from the bag packs it down and can add 20 to 30 g per cup.