Convert Cups to Grams: Powdered Sugar
Convert cups of powdered sugar to grams with this complete reference table. 1 cup of powdered sugar = 120g (USDA FoodData Central, spooned-and-leveled method). Use the table below for fractions from 1/8 cup up to 4 cups. For precision baking, weight measurements in grams are always more reliable than volume measurements in cups, because powdered sugar density can vary by measuring technique.
Powdered Sugar Cups to Grams Table
| Cups | Grams |
|---|---|
| 1/8 cup | 15g |
| 1/4 cup | 30g |
| 1/3 cup | 40g |
| 1/2 cup | 60g |
| 2/3 cup | 80g |
| 3/4 cup | 90g |
| 1 cup | 120g |
| 1 1/4 cups | 150g |
| 1 1/2 cups | 180g |
| 2 cups | 240g |
| 3 cups | 360g |
| 4 cups | 480g |
Based on USDA FoodData Central data (1 US cup = 240ml = 16 tablespoons = 48 teaspoons). Note: Powdered sugar (confectioners sugar, icing sugar) is much lighter than granulated. 1 cup unsifted = 120g. Sifted: ~100g. Always sift before using to remove lumps. Used for frosting, dusting, and recipes requiring smooth texture.
About Powdered Sugar Density
The density of powdered sugar determines how much it weighs per unit of volume. At 0.5g/ml, 1 US cup (240ml) of powdered sugar weighs 120g under USDA standard conditions.
Volume measurements can vary by ±10–20% depending on technique (sifted vs. spooned vs. scooped). For consistent baking results, use a kitchen scale with gram measurements whenever possible. The USDA standard (spooned-and-leveled) is the reference point for all values on this page.
Frequently Asked Questions
How many grams is 1 cup of powdered sugar?
1 cup of powdered sugar weighs 120 grams (USDA FoodData Central, spooned-and-leveled method, 1 US cup = 240ml).
How many grams is 1/2 cup of powdered sugar?
1/2 cup of powdered sugar weighs 60 grams.
How many grams is 1/4 cup of powdered sugar?
1/4 cup of powdered sugar weighs 30 grams.
Does measuring technique affect the weight of powdered sugar?
Yes. Sifted powdered sugar can weigh up to 20% less than packed or scooped. The USDA standard (spooned-and-leveled) of 120g/cup is the most reliable baseline.