Powdered sugar Grams to Cups Converter
Convert powdered sugar from grams to cups using ingredient-specific baking measurements.
100 grams of powdered sugar ≈
0.83US cups
About ¾ cup + 1 tablespoon
Based on 1 US cup of powdered sugar = 120g
Data last verified: August 4, 2026
Convert grams to cups
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100 grams of Powdered sugar =
0.83US cups
Approximately ¾ cup + 1 tablespoon
Based on 1 US cup of Powdered sugar = 120g
1 US cup of Powdered sugar = 120g
Measured spooned and leveled (unsifted, based on the US cup / 240 ml)
Powdered sugar grams to cups conversion table
| Grams | Cups |
|---|---|
| 50g | 0.42 cups |
| 100g | 0.83 cups |
| 125g | 1.04 cups |
| 150g | 1.25 cups |
| 200g | 1.67 cups |
| 250g | 2.08 cups |
| 300g | 2.50 cups |
| 500g | 4.17 cups |
Kitchen fraction approximation
Sources & how they compare
| Source | Reported value | Comparable source-cup value | Type | Measurement method | Adopted here | Checked |
|---|---|---|---|---|---|---|
| USDA FoodData Central — Sugars, powdered (FDC 169656)FDC ID: 169656Backup mirror reference: nutritionvalue.org mirror (backup reference) | 120 g/1 source cup, unsifted (exact volume unknown) | 120g | Direct | unsifted, spooned | Adopted | 2026-08-04 |
| King Arthur Baking — Ingredient Weight Chart | 113 g/1 source cup, unsifted (exact volume unknown) | 113g | Direct | unsifted, spooned and leveled | 2026-07-18 |
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 can reduce clumps and slightly lower the weight per cup.
- Humidity easily makes powdered sugar clump, which can add extra weight if it is not broken up before measuring.
Common mistakes
- Not measuring powdered sugar the recommended way — spooned and leveled — is one of the most common sources of error.
- Assuming 1 cup of powdered sugar equals 240g like water — it is actually 120g per US cup.
- Packing the powder into the cup instead of spooning it in and leveling.
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 powdered sugar is about 120 grams, measured spooned 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?
For the most accurate result, spooned and leveled, and 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 cup of powdered sugar weighs 120g, while a denser or lighter ingredient weighs a different amount per cup.
Where do these numbers come from?
See how we measure ingredient density and verify each grams-per-cup value.