Complete Cups to Grams Conversion Table for Cornstarch
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 Cornstarch Correctly (Scoop vs. Scale)
Spoon gently and level. Cornstarch compresses into squeaky chalk-like blocks if packed or scooped directly.
Too much cornstarch causes custard, curds, and pie fillings to turn rubbery, gelatinous, and crack upon cooling.
1-to-1 Substitute for Cornstarch: Tapioca Starch or Arrowroot Powder
1:1 by weight (120g per cup). Or use 2x weight of all-purpose flour for roux and sauces.
Tapioca gives a glossier sheen and withstands freezing without weeping water.
Storage, Shelf-Life & Humidity Impact on Cornstarch
Pantry Storage & Shelf-Life
Keep in a tightly sealed dry jar away from cooking steam.
Estimated Shelf-Life: Indefinite if kept completely dry.
Kitchen Humidity & Density Impact:
Humidity causes clumping that will not dissolve smoothly in cold liquids.
Frequently Asked Questions About Measuring Cornstarch
1How many grams is 1 cup of Cornstarch?
1 standard US cup of Cornstarch 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 Cornstarch?
3/4 cup (12 tablespoons) of Cornstarch weighs approximately 90 grams (3.2 oz).
3How many tablespoons of Cornstarch are in 100 grams?
100 grams of Cornstarch is approximately 13.3 level tablespoons (or 0.83 US cups). Weighing on a digital scale is always recommended for precision baking.
4Should Cornstarch be sifted, spooned, or packed when measuring with cups?
Spoon gently and level. Cornstarch compresses into squeaky chalk-like blocks if packed or scooped directly.