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Cooking conversion
Cups of Powdered Sugar (Confectioners' Sugar) to Ounces
How many ounces are in cups of powdered sugar? Type a value below to see the result instantly. Cooking conversions depend on the density of each ingredient — the math here uses 0.478 g/mL for powdered sugar.
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1 cup of powdered sugar = 3.9891 oz
Cups of Powdered Sugar (Confectioners' Sugar) to Ounces Conversion Table
Common values for powdered sugar:
| Cups of powdered sugar | Ounces |
|---|---|
| 0.25 cup | 0.997275 oz |
| 0.5 cup | 1.9945 oz |
| 1 cup | 3.9891 oz |
| 2 cup | 7.9782 oz |
| 3 cup | 11.9673 oz |
| 4 cup | 15.9564 oz |
| 5 cup | 19.9455 oz |
| 8 cup | 31.9128 oz |
| 10 cup | 39.891 oz |
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.
Ounces = cups × 3.9891
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.