Powdered Sugar Grams to Cups Converter
Convert powdered sugar from grams to cups using ingredient-specific baking measurements.
100 grams of powdered sugar ≈ 0.83 US cups
About ¾ cup + 1 tablespoon + 1 teaspoon
Based on 1 US cup of powdered sugar = 120g
Convert grams to cups
Enter an amount greater than 0.
100 grams of powdered sugar equals
0.83 US cups
¾ cup + 1 tbsp + 1 tsp
- Tablespoons 13.33 tbsp
- Teaspoons 40 tsp
- Milliliters 200 ml
Based on 1 US cup of powdered sugar = 120g
Customize grams per cup
Enter a number of grams greater than 0.
Conversions are approximate and may vary by ingredient brand, packing, humidity, and measuring method. Spoons: 15 ml tablespoon, 5 ml teaspoon. Kitchen estimates have up to 10% volume rounding error; very small amounts use a threshold. See Methodology for the policy.
How this conversion is calculated
Adopted reference value
1 US cup of Powdered sugar = 120g
Ingredient record reviewed: 2026-08-04
Cup type
US cup / 240 ml
Measuring method
Unsifted · spooned and leveled
Powdered sugar grams to cups conversion table
| Grams | Cups | tbspTablespoons | tspTeaspoons | ml |
|---|---|---|---|---|
| 50g | 0.42 cups | 6.67 | 20 | 100 |
| 100g | 0.83 cups | 13.33 | 40 | 200 |
| 125g | 1.04 cups | 16.67 | 50 | 250 |
| 150g | 1.25 cups | 20 | 60 | 300 |
| 200g | 1.67 cups | 26.67 | 80 | 400 |
| 250g | 2.08 cups | 33.33 | 100 | 500 |
| 300g | 2.50 cups | 40 | 120 | 600 |
| 500g | 4.17 cups | 66.67 | 200 | 1000 |
Kitchen fraction approximation
¼ cup
≈ 30g
⅓ cup
≈ 40g
½ cup
≈ 60g
⅔ cup
≈ 80g
¾ cup
≈ 90g
Sources & how they compare
| Source | Reported value | Comparable source-cup value | Type | Method the source states | Adopted here | Checked |
|---|---|---|---|---|---|---|
| USDA FoodData Central — Sugars, powdered (FDC 169656) FDC ID: 169656 Backup copy: nutritionvalue.org | 120 g per 1 cup (volume not stated) | 120g | Direct | unsifted; method not stated | Adopted | 2026-08-04 |
| King Arthur Baking — Ingredient Weight Chart | 113 g per 1 cup (volume not stated) | 113g | Direct | unsifted, as the chart states; method not stated | 2026-07-18 |
Measuring step this site recommends: spooned and leveled.
When sources disagree, follow your recipe: use its gram weights if it gives them, or measure the way its author did. The adopted value is one stated convention, not a correction of the other sources.
A comparable source-cup value only scales a half-cup or tablespoon serving to one source cup. When a source does not state the cup's exact volume, we do not present it as a fixed-milliliter normalization.
Measurement notes
- Powdered sugar is light and airy, so spoon it into the cup and level it rather than packing it down.
- Sifting powdered sugar before measuring breaks up clumps and noticeably lowers the weight per cup: USDA lists a sifted cup well below an unsifted one.
- Humidity easily makes powdered sugar clump, which can add extra weight if it is not broken up before measuring.
Common mistakes
- Assuming 1 cup of powdered sugar equals 240g like water — it is actually 120g per US cup.
- Using powdered sugar in place of granulated sugar cup for cup, although a cup of powdered sugar weighs much less.
Convert other ingredients in your recipe
Cocoa powder
1 cup = 84g · 100g ≈ 1.19 cups
View conversion →
Cornstarch
1 cup = 128g · 100g ≈ 0.78 cups
View conversion →
Granulated sugar
1 cup = 198g · 100g ≈ 0.51 cups
View conversion →
Butter
1 cup = 227g · 100g ≈ 0.44 cups
View conversion →
Each link converts that ingredient with its own cup weight; none of them is a substitute for this one.
Related amount conversions
Frequently asked questions
How many cups is 100 grams of powdered sugar?
100 grams of powdered sugar is about 0.83 cups, based on 1 US cup (240 ml) = 120g.
How many grams are in 1 cup of powdered sugar?
1 US cup of unsifted powdered sugar weighs about 120 grams when spooned into the cup and leveled.
Does 1 cup of powdered sugar weigh the same in a metric cup?
No. A metric cup (250 ml) holds slightly more than a US cup (240 ml), so 1 metric cup of powdered sugar is about 125g, compared with 120g in a US cup.
What's the best way to measure powdered sugar accurately?
Spoon unsifted powdered sugar into the cup and level it off. Use a kitchen scale when your recipe calls for a precise weight.
Can I convert cups of powdered sugar back to grams?
Yes, use the Cups to Grams tool with powdered sugar selected to convert any cup amount back into grams.
Why does powdered sugar convert differently from other ingredients?
Grams measure weight and cups measure volume, so the conversion depends on how dense powdered sugar is. A denser or lighter ingredient weighs a different amount per cup.