How Many Grams in a Cup of Powdered Sugar?
1 cup powdered sugar = 113 g4 oz · spooned & leveled · ½ cup = 57 g · 1 tbsp = 7.1 g
Reference values Being verified with kitchen scale tests. Current figures follow the King Arthur Baking ingredient weight chart.
On this page: Chart, ⅛ to 4 cups · Grams to cups · Measuring tips
Powdered Sugar cups to grams
113 g
1 cup powdered sugar (unsifted) (spooned & leveled) ≈ 4 oz
Reference values Being verified with kitchen scale tests. Current figures follow the King Arthur Baking ingredient weight chart.
Why powdered sugar has its own cups-to-grams number
Powdered sugar (confectioners’ or icing sugar) is very fine and fluffy, so a cup weighs much less than a cup of granulated sugar. The reference value is for unsifted powdered sugar spooned into the cup. Sifting adds air, so a cup of sifted powdered sugar weighs less again.
Powdered Sugar cups to grams chart
US cups and spoons, spooned & leveled. Grams are rounded to the nearest gram (0.1 g under 10 g).
| US measure | Grams | Ounces |
|---|---|---|
| 1 teaspoon | 2.4 g | 0.08 oz |
| 1 tablespoon | 7.1 g | 0.25 oz |
| ⅛ cup (2 tbsp) | 14 g | 0.5 oz |
| ¼ cup | 28 g | 1 oz |
| ⅓ cup | 38 g | 1.33 oz |
| ½ cup | 57 g | 1.99 oz |
| ⅔ cup | 75 g | 2.66 oz |
| ¾ cup | 85 g | 2.99 oz |
| 1 cup | 113 g | 3.99 oz |
| 1½ cups | 170 g | 5.98 oz |
| 2 cups | 226 g | 7.97 oz |
| 3 cups | 339 g | 12 oz |
| 4 cups | 452 g | 15.9 oz |
| Grams | US measures | Decimal cups |
|---|---|---|
| 50 g | ¼ cup + 3 tbsp + ¼ tsp | 0.44 cups |
| 100 g | ≈ ¾ cup + 2 tbsp + ½ tsp | 0.88 cups |
| 250 g | ≈ 2 cups + 3 tbsp + 1¼ tsp | 2.21 cups |
| 500 g | 4¼ cups + 2 tbsp + 2¼ tsp + ⅛ tsp | 4.42 cups |
“≈” means the amount is rounded to the nearest ⅛ teaspoon you can measure.
How to measure powdered sugar for this conversion
- Spoon it into the cup and level it; scooping straight from the bag packs it.
- Read the recipe wording: “1 cup sifted powdered sugar” means sift, then measure.
- Lumps are normal in an opened bag. Whisk or sift before measuring for frosting so it stays smooth.
- Never swap powdered sugar for granulated cup-for-cup — the weights are far apart.
Source: King Arthur Baking Ingredient Weight Chart (reference value, not yet scale-tested by Measure Pantry).