Ingredient Weight Converter · sweetener
Powdered Sugar: cups to grams
1 cup of powdered sugar weighs 113 grams. Use the converter below for any other amount, or check the quick-reference table.
Powdered Sugar baseline: 1 cup = 113 g.
Common amounts
| Cups | Tablespoons | Grams | Ounces (weight) | Milliliters |
|---|---|---|---|---|
| 1/4 cup | 4.0 | 28 g | 1.00 oz | 59 mL |
| 1/3 cup | 5.3 | 38 g | 1.33 oz | 79 mL |
| 1/2 cup | 8.0 | 57 g | 1.99 oz | 118 mL |
| 2/3 cup | 10.7 | 75 g | 2.66 oz | 158 mL |
| 3/4 cup | 12.0 | 85 g | 2.99 oz | 177 mL |
| 1 cup | 16.0 | 113 g | 3.99 oz | 237 mL |
| 1.5 cups | 24.0 | 170 g | 5.98 oz | 355 mL |
| 2 cups | 32.0 | 226 g | 7.97 oz | 473 mL |
| 3 cups | 48.0 | 339 g | 11.96 oz | 710 mL |
| 4 cups | 64.0 | 452 g | 15.94 oz | 946 mL |
Why measuring powdered sugar by cup goes wrong
Powdered sugar is granulated sugar pulverized to a fine dust with about 3 percent cornstarch added to prevent caking. The cornstarch is what makes royal icing dry into a hard shell and what makes a too-thick glaze taste faintly starchy. A cup, sifted, weighs about 113 grams; unsifted and scooped it can be 130 grams because the powder compacts.
Practical tips for working with powdered sugar
Always sift powdered sugar through a fine-mesh strainer before adding it to a glaze, frosting, or anywhere it needs to dissolve into a small amount of liquid. The lumps that look microscopic in the bag become unmistakable in a thin glaze on a lemon loaf. For dusting cookies, no need to sift — gravity sorts it as it falls through a small sieve.
Note from this ingredient's record: Also called confectioners' or icing sugar. Always sift before using in royal icing or glaze — clumps will not dissolve into a small amount of liquid.
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