Complete Cups to Grams Conversion Table for Powdered Sugar
Pre-calculated weight measurements across common baking volumes based on standard USDA density (1 cup = 120g / 4.2 oz).
| Volume Unit | Weight in Grams (g) | Weight in Ounces (oz) |
|---|---|---|
| 1 teaspoon (tsp) | 2.5 g | 0.09 oz |
| 1 tablespoon (Tbsp) | 7.5 g | 0.26 oz |
| 1/8 cup (2 Tbsp) | 15 g | 0.53 oz |
| 1/4 cup (4 Tbsp) | 30 g | 1.06 oz |
| 1/3 cup (5⅓ Tbsp) | 40 g | 1.41 oz |
| 1/2 cup (8 Tbsp) | 60 g | 2.12 oz |
| 2/3 cup (10⅔ Tbsp) | 80 g | 2.82 oz |
| 3/4 cup (12 Tbsp) | 90 g | 3.17 oz |
| 1 US cup (16 Tbsp) | 120 g | 4.23 oz |
| 2 US cups (32 Tbsp) | 240 g | 8.47 oz |
How to Measure Powdered Sugar Correctly (Scoop vs. Scale)
Sift first to eliminate packed lumps, then spoon gently into cup and sweep flat. 3% cornstarch is blended in by manufacturers.
Over-measuring powdered sugar makes buttercreams and royal icings stiff, grainy, overly sweet, and prone to cracking on cakes.
1-to-1 Substitute for Powdered Sugar: Blended Granulated Sugar + Cornstarch
For 120g: blend 116g granulated sugar with 4g cornstarch on high in a high-speed blender for 60 seconds.
Provides instant powdered sugar for icings when you run out mid-recipe.
Storage, Shelf-Life & Humidity Impact on Powdered Sugar
Pantry Storage & Shelf-Life
Airtight container in a dry pantry; keep away from strong odors as it absorbs kitchen smells.
Estimated Shelf-Life: 2 years.
Kitchen Humidity & Density Impact:
Absorbs kitchen humidity rapidly, forming hard marbles that clog piping tips.
Frequently Asked Questions About Measuring Powdered Sugar
1How many grams is 1 cup of Powdered Sugar?
1 standard US cup of Powdered Sugar weighs exactly 120 grams (4.2 ounces). This measurement is calibrated based on standardized USDA food density data and proper kitchen measuring protocol.
2How many grams is 3/4 cup of Powdered Sugar?
3/4 cup (12 tablespoons) of Powdered Sugar weighs approximately 90 grams (3.2 oz).
3How many tablespoons of Powdered Sugar are in 100 grams?
100 grams of Powdered Sugar is approximately 13.3 level tablespoons (or 0.83 US cups). Weighing on a digital scale is always recommended for precision baking.
4Should Powdered Sugar be sifted, spooned, or packed when measuring with cups?
Sift first to eliminate packed lumps, then spoon gently into cup and sweep flat. 3% cornstarch is blended in by manufacturers.