Home › Ingredients › Powdered sugar (icing sugar)
Powdered sugar (icing sugar): cups to grams
1 cup of powdered sugar (icing sugar) = 120 grams (4.2 oz). 1 tablespoon = 7.5 g, 1 teaspoon = 2.5 g. Measured: unsifted; sifted powdered sugar is about 100 g per cup.
Fractions work: 1/3, 1 1/2
Powdered sugar (icing sugar) cups to grams chart
| US cups | Grams | Ounces |
|---|---|---|
| 1/8 cup | 15 g | 0.53 oz |
| 1/4 cup | 30 g | 1.1 oz |
| 1/3 cup | 40 g | 1.4 oz |
| 1/2 cup | 60 g | 2.1 oz |
| 2/3 cup | 80 g | 2.8 oz |
| 3/4 cup | 90 g | 3.2 oz |
| 1 cup | 120 g | 4.2 oz |
| 1 1/2 cups | 180 g | 6.3 oz |
| 2 cups | 240 g | 8.5 oz |
| 3 cups | 360 g | 12.7 oz |
| 4 cups | 480 g | 16.9 oz |
Tablespoons and teaspoons
| Spoon measure | Grams |
|---|---|
| 1 teaspoon | 2.5 g |
| 2 teaspoons | 5.0 g |
| 1 tablespoon | 7.5 g |
| 2 tablespoons | 15 g |
| 3 tablespoons | 23 g |
| 4 tablespoons (1/4 cup) | 30 g |
Powdered sugar (icing sugar) grams to cups
| Grams | US cups (decimal) | Closest kitchen measure |
|---|---|---|
| 25 g | 0.21 | 3.5 tbsp |
| 50 g | 0.42 | 1/3 cup + 1.5 tbsp |
| 100 g | 0.83 | 3/4 cup + 1.5 tbsp |
| 125 g | 1.04 | 1 cup + 0.5 tbsp |
| 150 g | 1.25 | 1 1/4 cups |
| 200 g | 1.67 | 1 2/3 cups |
| 250 g | 2.08 | 2 cups + 1.5 tbsp |
| 300 g | 2.50 | 2 1/2 cups |
| 400 g | 3.33 | 3 1/3 cups |
| 500 g | 4.17 | 4 cups + 2.5 tbsp |
| 750 g | 6.25 | 6 1/4 cups |
| 1000 g | 8.33 | 8 1/3 cups |
"Closest kitchen measure" rounds down to the nearest standard cup size, then makes up the rest in tablespoons, to the nearest half tablespoon.
Where this number comes from
The weight is taken from the USDA FoodData Central SR Legacy record "Sugars, powdered" (FDC ID 169656), portion "1 cup unsifted" = 120 g. US cups are 236.59 mL. A metric cup (250 mL) holds about 127 g, and a UK imperial cup (284 mL) about 144 g.
Real kitchens vary. Brand, humidity, how finely something is ground and how hard you pack the cup can all move the weight by 5–15%. If a recipe author gives grams, use their number.