Cups to Grams / Ingredients / Cornstarch
1 Cup Cornstarch in Grams (128 g)
1 cup of cornstarch weighs 128 g (4.52 oz), according to USDA FoodData Central. That makes 1 tablespoon 8 g and 1 teaspoon 2.7 g.
Cornstarch1 cup
128g
- Ounces
- 4.52 oz
- 1 tbsp
- 8 g
- 1 tsp
- 2.7 g
- Source
- USDA FDC #169698
Convert another amount of cornstarch in the calculator, including grams back to cups.
Cornstarch cups to grams chart
| Amount | Grams | Ounces |
|---|---|---|
| 1/8 cup | 16 g | 0.56 oz |
| 1/4 cup | 32 g | 1.13 oz |
| 1/3 cup | 42.7 g | 1.51 oz |
| 1/2 cup | 64 g | 2.26 oz |
| 2/3 cup | 85.3 g | 3.01 oz |
| 3/4 cup | 96 g | 3.39 oz |
| 1 cup | 128 g | 4.52 oz |
| 1 1/2 cups | 192 g | 6.77 oz |
| 2 cups | 256 g | 9.03 oz |
| 3 cups | 384 g | 13.5 oz |
| 1 tbsp | 8 g | 0.28 oz |
| 2 tbsp | 16 g | 0.56 oz |
| 1 tsp | 2.7 g | 0.09 oz |
| 1/2 tsp | 1.3 g | 0.05 oz |
Each row is USDA’s 1-cup weight (128 g) times the amount. A tablespoon is 1/16 cup and a teaspoon is 1/48 cup, so 1 tbsp = 128 ÷ 16 = 8 g. Ounces are grams ÷ 28.3495.
Cornstarch grams to cups
| Weight | Cups | Closest measure |
|---|---|---|
| 25 g | 0.2 | 3 tbsp + 1/2 tsp |
| 50 g | 0.39 | 1/3 cup + 2 3/4 tsp |
| 100 g | 0.78 | 3/4 cup + 1 1/2 tsp |
| 200 g | 1.56 | 1 1/2 cups + 1 tbsp |
| 250 g | 1.95 | 1 3/4 cups + 3 tbsp + 3/4 tsp |
| 500 g | 3.91 | 3 3/4 cups + 2 tbsp + 1 1/2 tsp |
Cups = grams ÷ 128. The last column rounds to the nearest 1/4 teaspoon using a standard set of cups and spoons.
What USDA lists for cornstarch
| USDA portion | Grams | Ounces |
|---|---|---|
| 1 cup | 128 g | 4.52 oz |
Source: USDA FoodData Central, SR Legacy, FDC ID 169698: “Cornstarch”, published 4/1/2019. Portion used for this page: “1 cup” = 128 g. Cups to spoons: USDA ARS measure equivalents (1 cup = 16 tbsp = 48 tsp).
Measuring cornstarch by the cup
Spoon or pour into a dry measuring cup and strike off the excess with a straight edge, as NIST suggests. Shaking or tapping the cup settles it and adds weight.