How many grams in a cup of powdered sugar?
1 cup of powdered sugar weighs 120 g.1 tablespoon: 7.5 g1 teaspoon: 2.5 g
Weights are for powdered sugar (unsifted), in US customary cups.
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= 120 g
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Cups to grams
| Cups | Grams |
|---|---|
| ⅛ cup | 15 g |
| ¼ cup | 30 g |
| ⅓ cup | 40 g |
| ½ cup | 60 g |
| ⅔ cup | 80 g |
| ¾ cup | 90 g |
| 1 cup | 120 g |
| 1 ½ cups | 180 g |
| 2 cups | 240 g |
| 3 cups | 360 g |
Grams to cups
| Grams | US measure |
|---|---|
| 25 g | 3 tbsp + 1 tsp |
| 50 g | ≈ ¼ cup + 3 tbsp |
| 100 g | ≈ ¾ cup + 1 tbsp |
| 150 g | 1 ¼ cups |
| 200 g | ≈ 1 ½ cups + 3 tbsp |
| 250 g | 2 cups + 1 tbsp |
| 500 g | 4 cups + 3 tbsp |
| 1,000 g | 8 ¼ cups + 1 tbsp |
Rounded to amounts you can measure; ≈ marks a rounded answer.
Measuring powdered sugar
Sifted, a cup weighs about 100 g.
These weights are for powdered sugar (unsifted). A different form, or a cup filled another way, weighs differently, so weigh it if the recipe gives grams.
The King Arthur Baking ingredient weight chart gives 113 g per cup. We use the USDA figure throughout.
Source
USDA FoodData Central, food 169656: “Sugars, powdered”, 1 cup, unsifted = 120 g (USDA FoodData Central SR Legacy, April 2018). Other amounts are calculated with 1 cup = 16 tablespoons = 48 teaspoons. Data version 2026-10-17.1, reviewed 16 October 2026.
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