Powdered Sugar: Cups to Grams
One US cup of powdered sugar weighs about 120 grams (4.2 oz). Use the converter or the chart below for any amount.
Quick answer
- 1 cup powdered sugar 120 g
- ¾ cup powdered sugar 90 g
- ½ cup powdered sugar 60 g
- ⅓ cup powdered sugar 40 g
- ¼ cup powdered sugar 30 g
- 1 tbsp powdered sugar 7.5 g
- 1 tsp powdered sugar 2.5 g
Approximate values. Density varies with how the ingredient is packed, sifted, or measured.
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Powdered Sugar cups to grams chart
| Amount | Grams | Ounces |
|---|---|---|
| 1/8 cup powdered sugar | 15 g | 0.5 oz |
| 1/4 cup powdered sugar | 30 g | 1.1 oz |
| 1/3 cup powdered sugar | 40 g | 1.4 oz |
| 1/2 cup powdered sugar | 60 g | 2.1 oz |
| 2/3 cup powdered sugar | 80 g | 2.8 oz |
| 3/4 cup powdered sugar | 90 g | 3.2 oz |
| 1 cup powdered sugar | 120 g | 4.2 oz |
| 1 1/4 cups powdered sugar | 150 g | 5.3 oz |
| 1 1/2 cups powdered sugar | 180 g | 6.3 oz |
| 2 cups powdered sugar | 240 g | 8.5 oz |
| 2 1/2 cups powdered sugar | 300 g | 10.6 oz |
| 3 cups powdered sugar | 360 g | 12.7 oz |
| 4 cups powdered sugar | 480 g | 16.9 oz |
| 1 tablespoon powdered sugar | 7.5 g | 0.3 oz |
| 1 teaspoon powdered sugar | 2.5 g | 0.1 oz |
Powdered Sugar grams to cups
Working the other way? Since 1 cup of powdered sugar is about 120 g, here is how common gram weights convert back to cups.
| Grams | Cups (approx) |
|---|---|
| 25 g powdered sugar | 0.21 cups |
| 50 g powdered sugar | 0.42 cups |
| 75 g powdered sugar | 0.63 cups |
| 100 g powdered sugar | 0.83 cups |
| 125 g powdered sugar | 1.04 cups |
| 150 g powdered sugar | 1.25 cups |
| 200 g powdered sugar | 1.67 cups |
| 250 g powdered sugar | 2.08 cups |
| 300 g powdered sugar | 2.5 cups |
| 500 g powdered sugar | 4.17 cups |
| 1000 g powdered sugar | 8.33 cups |
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Measuring powdered sugar accurately
Powdered sugar — also sold as icing or confectioners' sugar — is granulated sugar ground to a fine dust with a little cornstarch added to stop it caking. That cornstarch and the air trapped between the fine particles make it light, so a cup is only about 120 g, and it clumps in the box. Always sift it before measuring or whisking into frosting: unsifted lumps won't dissolve and leave white specks in icing. Because it dissolves almost instantly, it's used where granulated sugar would stay gritty — buttercream, glazes, and dusting over cakes. If a recipe gives a weight, trust that over the cup, because how recently the bag was sifted changes the volume a lot.
Also called icing or confectioners’ sugar. Sift before measuring. Because a cup measures volume rather than weight, the most reliable way to get the same result every time is to weigh powdered sugar on a kitchen scale and aim for the gram figure above. The conversions on this page are based on the US cup of about 236.6 ml.
FAQ
- How many grams is 1 cup of powdered sugar?
- One US cup of powdered sugar weighs about 120 grams (4.2 oz). Also called icing or confectioners’ sugar. Sift before measuring.
- How many grams is 3/4 cup of powdered sugar?
- Three quarters of a US cup of powdered sugar is about 90 grams (3.2 oz).
- How many grams is 2/3 cup of powdered sugar?
- Two thirds of a US cup of powdered sugar is about 80 grams.
- How many grams is 1/2 cup of powdered sugar?
- Half a US cup of powdered sugar is about 60 grams (2.1 oz).
- How many grams is 1/3 cup of powdered sugar?
- One third of a US cup of powdered sugar is about 40 grams.
- How many grams is 1/4 cup of powdered sugar?
- A quarter of a US cup of powdered sugar is about 30 grams.
- How many grams is 1 tablespoon of powdered sugar?
- One tablespoon of powdered sugar is about 7.5 grams, since a tablespoon is one sixteenth of a cup.
- How many cups is 100 grams of powdered sugar?
- 100 grams of powdered sugar is about 0.83 cups.