How many cups is 100 g of powdered sugar?

100 g of powdered sugar is about 0.74 cups.

Why isn't 100 g exactly 1 cup?

Because powdered sugar isn't the same density as water. A cup holds a fixed volume, and powdered sugar weighs more or less than water for that volume.

Grams of powdered sugar to cups

Answer

100 g of powdered sugar = 0.74 cups

Convert any amount

Amount gram = – cup

Conversion table

Grams	Cups
10 g	0.07 cup
25 g	0.19 cup
50 g	0.37 cup
100 g	0.74 cup
150 g	1.12 cup
200 g	1.49 cup
250 g	1.86 cup
300 g	2.23 cup
500 g	3.72 cup

Based on the US customary cup of 240 ml. A metric cup (250 ml) is about 4% larger.

Handy tools for this

Digital kitchen scale The most accurate way to bake — skip the cup guesswork and weigh straight into the bowl to the nearest gram. Check price → Measuring cups set A sturdy nested set of US cups for recipes written in cups. Cheap, dishwasher-safe and built to last. Check price → Measuring spoons Tablespoon and teaspoon set for small, precise amounts of baking powder, salt and spices. Check price →

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How to measure

Powdered (icing) sugar clumps and settles, so sift it before measuring for an accurate volume reading.

Frequently asked questions

How many cups is 100 g of powdered sugar?: 100 g of powdered sugar is about 0.74 cups.
Why isn't 100 g exactly 1 cup?: Because powdered sugar isn't the same density as water. A cup holds a fixed volume, and powdered sugar weighs more or less than water for that volume.

Related conversions

Values are approximate — ingredient density varies with brand, humidity and how you measure. For baking, weighing on a scale is always the most reliable method.