How many cups is 100 grams of cornstarch?
100 g of cornstarch ≈ 0.833 cups
One US cup of cornstarch weighs about 120 grams, so 100 grams works out to roughly 0.833 cups. Cornstarch is fine and powdery — stir it before measuring to break up any lumps.
100 g is a common recipe quantity, but cups measure volume, not weight. For the most reliable result, weigh cornstarch with a kitchen scale rather than scooping — see why weighing wins.
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Cornstarch conversion chart
| Grams | Cups | Tablespoons | Ounces |
|---|---|---|---|
| 10 g | 0.083 | 1.33 | 0.353 oz |
| 25 g | 0.208 | 3.33 | 0.882 oz |
| 50 g | 0.417 | 6.67 | 1.76 oz |
| 75 g | 0.625 | 10 | 2.65 oz |
| 100 g | 0.833 | 13.33 | 3.53 oz |
| 125 g | 1.04 | 16.67 | 4.41 oz |
| 150 g | 1.25 | 20 | 5.29 oz |
| 200 g | 1.67 | 26.67 | 7.05 oz |
| 250 g | 2.08 | 33.33 | 8.82 oz |
| 300 g | 2.5 | 40 | 10.58 oz |
| 400 g | 3.33 | 53.33 | 14.11 oz |
| 500 g | 4.17 | 66.67 | 17.64 oz |
Other cornstarch conversions
* Conversion figures are typical average weights for one US customary cup (236.6 ml), based on the King Arthur Baking Ingredient Weight Chart and cross-referenced with the U.S. Department of Agriculture FoodData Central database. Actual weight varies with packing, brand and humidity — see our methodology.