I'm making frosting and need 2 cups of powdered sugar — how many grams is that?

2 cups × 120 g ≈ 240 g. Sift the sugar first if it's clumpy, since dense clumps can throw off a volume measurement more than they would a weight measurement.

Powdered sugar looks so much fluffier than granulated sugar — why do they weigh almost the same per cup?

The very fine particles in powdered sugar pack together more tightly with less air between them, which roughly offsets the lighter, fluffier appearance — both end up around 120 g (powdered) and 200 g (granulated) per cup, a real difference but not as dramatic as the visual difference suggests.

Powdered Sugar: Cups to Grams Converter

Convert powdered sugar between cups, tablespoons, teaspoons, milliliters, grams, and ounces.

Ingredient

Amount

From

Powdered Sugar: 120 Grams

Powdered sugar (also called confectioners' or icing sugar) is sugar ground to a fine powder and mixed with a small amount of cornstarch to prevent clumping. Despite looking lighter and fluffier than granulated sugar, it weighs about the same per cup (120 g) because the fine particles pack together more tightly, offsetting their smaller size.

Common Amounts

Powdered Sugar cups to grams
Cups	Grams
1/4 cups	30 g
1/3 cups	40 g
1/2 cups	60 g
3/4 cups	90 g
1 cup	120 g
2 cups	240 g

Frequently Asked Questions

Last reviewed: 2026-06-11 · Source: USDA FoodData Central / King Arthur Baking ingredient weight charts · see our methodology

All-Purpose Flour cups to grams Bread Flour cups to grams Whole Wheat Flour cups to grams Granulated Sugar cups to grams Brown Sugar (packed) cups to grams Butter cups to grams Honey cups to grams Milk cups to grams

Powdered Sugar: Cups to Grams Converter

Common Amounts

Frequently Asked Questions

Related Converters