One and a Half Cups of Powdered Sugar in Grams
1 1/2 cups of powdered sugar weighs 180g (6.35 oz, 360ml) according to USDA FoodData Central (1 cup powdered sugar = 120g, spooned and leveled method). 1 1/2 cups = 1.5 of a full cup (240ml). See the full conversion table below for all amounts from 1 tablespoon to 3 cups.
Powdered Sugar Cup-to-Gram Conversion Table
Full range from 1 tablespoon to 3 cups. The highlighted row shows 1 1/2 cups.
| Amount | Grams |
|---|---|
| 1 tbsp | 7.5g |
| 2 tbsp | 15g |
| 1/8 cup | 15g |
| 1/4 cup | 30g |
| 1/3 cup | 40g |
| 1/2 cup | 60g |
| 2/3 cup | 80g |
| 3/4 cup | 90g |
| 1 cup | 120g |
| 1 1/4 cups | 150g |
| 1 1/2 cupsthis page | 180g |
| 1 3/4 cups | 210g |
| 2 cups | 240g |
| 2 1/2 cups | 300g |
| 3 cups | 360g |
Source: USDA FoodData Central (FDC ID: 19336). 1 US cup = 240ml. Values use spooned-and-leveled method.
1½ Cups of Different Ingredients — Weight Comparison
1 1/2 cups of different ingredients varies widely in weight because each has a different density. This matters when substituting ingredients in recipes.
| Ingredient | 1½ Cups (g) |
|---|---|
| Powdered Sugarcurrent | 180g |
| Granulated Sugar | 300g |
| Caster Sugar | 315g |
| Brown Sugar (packed) | 330g |
All values use USDA FoodData Central spooned-and-leveled method. Click any ingredient to see its full conversion table.
Measuring Powdered Sugar Accurately
Why weight matters: 1 1/2 cups of powdered sugar can weigh anywhere from 153g to 216g depending on how you measure it. The USDA standard is 180g (spooned and leveled). Scooping directly from the container can add 10–20% extra weight, which affects recipe results — especially in baking.
About powdered sugar density: Powdered sugar (confectioners sugar, icing sugar) is much lighter than granulated. 1 cup unsifted = 120g. Sifted: ~100g. Always sift before using to remove lumps. Used for frosting, dusting, and recipes requiring smooth texture.
About 1½ Cups as a Measurement
1 1/2 cups = 24 tablespoons = 360ml. This is the standard flour amount for a dozen standard-size cookies or a single-layer 8-inch cake. It bridges the gap between single-cup and double-cup recipe scales.
One and a half cups appears most often in cookie dough recipes (flour), quick bread recipes (oats or mix-ins), and pasta sauce recipes (liquid ingredients). It equals 360ml or 12 fluid ounces.
Frequently Asked Questions
How many grams is 1 1/2 cups of powdered sugar?
1 1/2 cups of powdered sugar weighs 180 grams (6.35 oz, 360ml). Based on USDA FoodData Central: 1 cup powdered sugar = 120g, so 1 1/2 cups = 120 × 1.500 = 180g.
Is 1 1/2 cups of powdered sugar the same weight every time?
The weight can vary slightly depending on measuring technique. Spooned and leveled gives 180g. Scooped (packed) can be 10–20% heavier. Sifted gives a lighter weight. The USDA standard (spooned and leveled) of 180g is the most reliable baseline for recipes.
How do I accurately measure 1 1/2 cups of powdered sugar?
For accuracy, use a kitchen scale and weigh 180g of powdered sugar. If using measuring cups, spoon the powdered sugar lightly into a 1½ Cups measuring cup and level off the top with a straight edge. Avoid scooping directly from the container, which compacts the ingredient and adds extra weight.
How does 1 1/2 cups of powdered sugar compare to other ingredients?
1 1/2 cups of different ingredients varies significantly: Powdered Sugar = 180g, Granulated Sugar = 300g, Caster Sugar = 315g. This is because each ingredient has a different density.