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Cooking conversion
Ounces of Powdered Sugar (Confectioners' Sugar) to Cups
How many cups of powdered sugar are in a given weight? Type a number of ounces below to see the volume. Math uses powdered sugar's density of 0.478 g/mL.
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100 oz of powdered sugar = 25.0683 cup
Ounces of Powdered Sugar (Confectioners' Sugar) to Cups Conversion Table
Common values for powdered sugar:
| Ounces of powdered sugar | Cups |
|---|---|
| 10 oz | 2.5068 cup |
| 25 oz | 6.2671 cup |
| 50 oz | 12.5342 cup |
| 100 oz | 25.0683 cup |
| 150 oz | 37.6025 cup |
| 200 oz | 50.1366 cup |
| 250 oz | 62.6708 cup |
| 500 oz | 125.34 cup |
| 1000 oz | 250.68 cup |
How this works
Powdered sugar has a density of about 0.478 g/mL (king arthur baking: 1 cup = 113g). That means 1 mL of powdered sugar weighs 0.478 grams.
Cups = ounces × 0.2507
Note: Unsifted; sifted is closer to 0.42 g/mL.
Why a cup of powdered sugar doesn't always weigh the same
Volume measurements are forgiving in some ways and brutal in others. A cup of powdered sugar can vary by 10-20% in weight depending on how it's measured: spooned vs scooped, packed vs loose, sifted vs unsifted. The density figure used here matches the most common published recipe conventions, but if you're after baking precision, weighing on a kitchen scale is more accurate than measuring by volume.