Quick Answer
One US cup of powdered (confectioners) sugar weighs about 120 grams. That works out to 7.5 g per tablespoon and 2.5 g per teaspoon. Light and fluffy; ~105 g if not packed. Weights vary slightly by brand, moisture, and how tightly you pack - for precise baking, a kitchen scale beats volume measures.
Key Facts
- 1 cup powdered (confectioners) sugar = 120 g
- 1 tablespoon = 7.5 g
- 1 teaspoon = 2.5 g
- 1/2 cup = 60 g
- Light and fluffy; ~105 g if not packed.
- Values assume standard US measures (1 cup = 236.59 mL)
Frequently Asked Questions
How many grams in 1 cup of powdered (confectioners) sugar?
About 120 grams, scoop-and-level for dry ingredients. Light and fluffy; ~105 g if not packed.
How many grams in a tablespoon of powdered (confectioners) sugar?
One US tablespoon (15 mL) of powdered (confectioners) sugar is about 7.5 grams. A teaspoon is 2.5 g.
Why does powdered (confectioners) sugar weigh more (or less) than water?
Dry ingredients are weighed by how they pack into the cup volume. Powdered (Confectioners) Sugar has an apparent density of about 0.51 g/mL - lighter than water - depending on particle size and air gaps.
How many cups is 100 g of powdered (confectioners) sugar?
100 g ÷ 120 g/cup ≈ 0.83 cups - about a little less than a full cup. The reverse table on this page covers 25-1000 g.
Should I weigh or measure by volume?
Weighing is more accurate - volume measures vary with how you scoop, pack, and level, and brands differ by 5-15%. For cookies and cakes where ratios matter, grams are the professional standard. The tables here convert either direction.