Grams of Powdered Sugar to Cups
One US cup of powdered sugar weighs 120 grams. To convert grams of powdered sugar to cups, divide the grams by 120 — so 100 g is ⅞ cup and 120 g is exactly 1 cup.
250 g Powdered (icing/confectioners') sugar = 2 ⅛ cups
Exactly 2.08 cups — or measure 2 cups + 1 tbsp.
Powdered Sugar cups-to-grams chart
| Cups | Grams | Ounces |
|---|---|---|
| ¼ cups | 30 g | 1.1 oz |
| ⅓ cups | 40 g | 1.4 oz |
| ½ cups | 60 g | 2.1 oz |
| ⅔ cups | 80 g | 2.8 oz |
| ¾ cups | 90 g | 3.2 oz |
| 1 cup | 120 g | 4.2 oz |
| 1½ cups | 180 g | 6.3 oz |
| 2 cups | 240 g | 8.5 oz |
How to measure powdered sugar
These values are for unsifted powdered sugar, spooned into the cup and leveled (120 g). If your recipe says "sifted powdered sugar," sift first and expect closer to 100 g per cup — sifting adds a lot of air.
Grams of powdered sugar to cups — every amount
- 50 g to cups — ⅜ cup
- 100 g to cups — ⅞ cup
- 125 g to cups — 1 cup
- 150 g to cups — 1 ¼ cups
- 200 g to cups — 1 ⅔ cups
- 250 g to cups — 2 ⅛ cups
- 300 g to cups — 2 ½ cups
- 400 g to cups — 3 ⅓ cups
- 500 g to cups — 4 ⅛ cups
Other ingredients
- Grams of flour to cups
- Grams of sugar to cups
- Grams of brown sugar to cups
- Grams of honey to cups
- Grams of butter to cups
- Grams of milk to cups
- Grams of rice to cups
- Grams of oats to cups
- Grams of chocolate chips to cups
- Grams of cocoa powder to cups
- Grams of water to cups
Density 120 g/cup — sources: USDA FoodData Central, King Arthur Baking ingredient weight chart. Data verified 2026-08-20. Methodology.