| US cup amount | Weight |
|---|---|
| 1/8 cup | 14 g |
| 1/4 cup | 28 g |
| 1/3 cup | 38 g |
| 1/2 cup | 56 g |
| 3/4 cup | 85 g |
| 1 cup | 113 g |
| 1 1/2 cups | 170 g |
| 2 cups | 226 g |
Powdered Sugar Grams to Cups: 1 Cup = 113 g
1 US cup of powdered sugar weighs 113 grams. One US cup of unsifted powdered sugar weighs 113 grams. Confectioners' sugar and icing sugar are common names for the same finely ground ingredient.
Use the converter and charts below for confectioners' sugar, unsifted and not packed.
Grams to Cups Converter
Choose the ingredient before converting because every ingredient has a different weight per cup.
Grams to Cups Converter
Results use the documented ingredient state and one US customary cup.
Divide the gram amount by 113 to calculate US cups. The practical fraction is a measuring aid, not a replacement for the exact gram weight.
| Grams | US cups | Practical reference |
|---|---|---|
| 25 g | 0.22 cups | about 1/4 cup |
| 30 g | 0.27 cups | about 1/4 cup |
| 40 g | 0.35 cups | about 1/3 cup |
| 50 g | 0.44 cups | about 1/2 cup |
| 60 g | 0.53 cups | about 1/2 cup |
| 75 g | 0.66 cups | about 2/3 cup |
| 80 g | 0.71 cups | about 3/4 cup |
| 100 g | 0.88 cups | about 1 cup |
| 120 g | 1.06 cups | about 1 cup |
| 125 g | 1.11 cups | about 1 1/8 cups |
| 150 g | 1.33 cups | about 1 1/3 cups |
| 200 g | 1.77 cups | about 1 3/4 cups |
| 250 g | 2.21 cups | about 2 1/4 cups |
| 300 g | 2.65 cups | about 2 2/3 cups |
| 400 g | 3.54 cups | about 3 1/2 cups |
| 500 g | 4.42 cups | about 4 1/2 cups |
Break up obvious lumps and spoon the sugar lightly into the cup without packing. Sift before measuring only when the recipe specifically calls for sifted powdered sugar, because sifting changes the occupied volume.
Grams = cups × 113
One cup is 113 grams, one-half cup is about 56 grams and one-quarter cup is about 28 grams.
Common uses
- Glazes and icing
- Buttercream
- Dusting and no-bake desserts
This page assumes powdered sugar straight from the box, unsifted and not pressed down. Sifting is the variable that matters most here.
| Type | Grams per US cup | What changes |
|---|---|---|
| Powdered sugar, unsifted | 113 g | The reference on this page. |
| Powdered sugar, sifted | 99 g | Sifting adds air and lightens the cup. |
| Granulated sugar | 198 g | Nearly double the weight per cup. |
| Cornstarch | 113 g | Similar density; often blended into powdered sugar. |
If a recipe reads "1 cup sifted powdered sugar", sift first and then measure. "1 cup powdered sugar, sifted" means measure first. The two are about 14 grams apart.
Comparison figures are typical published US baking references. Only the powdered sugar, unsifted value above is part of this site's sourced dataset.
Finely ground sugar holds more air than granulated sugar. That is why a cup of powdered sugar weighs much less than a cup of white granulated sugar even though both ingredients are sugar.
The converter does not assume that every cup weighs 237 or 250 grams. It uses the documented value for the exact ingredient and state selected.
If a product label or recipe publisher supplies a different gram weight for one cup, follow that recipe-specific value for the closest match to the original testing.
Method and source
How this conversion was checked
This page uses 113 grams per US cup for confectioners' sugar, unsifted and not packed. Sift only when the recipe specifically asks for sifted sugar.
Primary reference: King Arthur Baking Ingredient Weight Chart
Cup standard: NIST US customary cup reference
How many grams are in one cup of powdered sugar?
One US cup of confectioners' sugar, unsifted and not packed uses a working reference of 113 grams on GramstoCup.co.
How many cups is 100 grams of powdered sugar?
100 grams of confectioners' sugar, unsifted and not packed is 0.88 US cups.
How many grams is half a cup of powdered sugar?
Half a US cup is approximately 56 grams using the 113 gram full-cup reference.
Can the result vary by brand or method?
Yes. Sift only when the recipe specifically asks for sifted sugar. Use the original recipe weight when precision is important.
Are these US cups or metric cups?
The results use a US customary cup. A metric cup is 250 milliliters and can produce a different answer.
Other Ingredient Guides
Each guide uses its own grams-per-cup standard.