Cups to Grams Converter
Pick an ingredient and type cups to get grams. A cup holds a different weight of each ingredient, so the answer depends on what is in it.
2 cups of all-purpose flour =
250g
2 US cups of all-purpose flour is 250 grams.
- 1 cup
- 125 g
- 1 g
- 0.008 cups
How to convert cups to grams
A cup measures volume, a gram measures weight, so there is no single factor: you need the weight of one cup of the ingredient in front of you. Multiply the number of cups by that weight. The figures here are the USDA’s measured weights for one US cup, from its FoodData Central database.
For 3 cups of all-purpose flour at 125 g a cup: 3 × 125 = 375 g. For 1½ cups of granulated sugar at 200 g a cup: 1.5 × 200 = 300 g. The same 1½ cups of rolled oats would be only 121.5 g, because oats are full of air.
Dry ingredients vary with how the cup is filled. Spooning flour into the cup and levelling it gives a lighter cup than scooping it straight from the bag, and brown sugar is measured packed down. USDA lists powdered sugar at 120 g unsifted but 100 g sifted, a 20% difference from technique alone. When a recipe gives grams, weighing is the reliable route.
grams = cups × grams in one cup of the ingredient
- USDA weighs one cup of all-purpose flour at 125 g, bread flour at 137 g and whole-wheat flour at 120 g, so the type of flour changes the answer by more than 10%. Source: USDA FoodData Central, SR Legacy, FDC 168936.
- US nutrition labels use a 240 mL cup; the US customary cup used in recipes is slightly smaller, 236.6 mL. Source: 21 CFR 101.9(b)(5), FDA nutrition labelling.
How to estimate cups to grams in your head
Memorize three anchors: a cup of flour is about 125 g, a cup of sugar about 200 g, and a cup of butter about 225 g (two US sticks). Most baking amounts are halves, thirds and quarters of those: half a cup of sugar is 100 g, a quarter cup of butter is about 57 g.
For liquids that behave like water, a cup is close to 240 g. Milk comes in at 244 g, and anything thick and sugary such as honey is far heavier, 339 g a cup.
Cups to grams by ingredient
USDA weights for one US cup, and the usual fractions, rounded to whole grams.
| Ingredient | ¼ cup | ⅓ cup | ½ cup | 1 cup |
|---|---|---|---|---|
| All-purpose flour | 31 g | 42 g | 63 g | 125 g |
| Bread flour | 34 g | 46 g | 69 g | 137 g |
| Whole wheat flour | 30 g | 40 g | 60 g | 120 g |
| Granulated sugar | 50 g | 67 g | 100 g | 200 g |
| Brown sugar, packed | 55 g | 73 g | 110 g | 220 g |
| Powdered sugar | 30 g | 40 g | 60 g | 120 g |
| Butter | 57 g | 76 g | 114 g | 227 g |
| White rice, uncooked | 46 g | 62 g | 93 g | 185 g |
| Rolled oats | 20 g | 27 g | 41 g | 81 g |
| Cocoa powder | 22 g | 29 g | 43 g | 86 g |
Show all 15 rowsShow fewer
| Honey | 85 g | 113 g | 170 g | 339 g |
| Milk | 61 g | 81 g | 122 g | 244 g |
| Olive oil | 54 g | 72 g | 108 g | 216 g |
| Almonds, whole | 36 g | 48 g | 72 g | 143 g |
| Table salt | 73 g | 97 g | 146 g | 292 g |
Frequently Asked Questions
How many grams is 1 cup of flour?
USDA lists 125 g for a cup of all-purpose flour. Some baking books use 120 g, which matches flour spooned in lightly; a cup scooped straight from the bag weighs more.
How many grams is 1 cup of sugar?
About 200 g for granulated white sugar. Packed brown sugar is heavier, 220 g, and powdered sugar much lighter, 120 g unsifted.
How many grams is a cup of butter?
227 g, which is two US sticks of 113 g each, or half a pound. Because sticks are sold by weight, the tablespoon marks on the wrapper are a dependable guide.
Is a cup of water 250 grams?
Only with a 250 mL metric cup. A US cup holds 236.6 mL, so it carries about 236 g of water, and a nutrition-label cup of 240 mL about 240 g.