Cornstarch (cornflour): cups to grams
Cornstarch, called cornflour in the UK and Australia, weighs about 128 g per cup and 8 g per tablespoon. It thickens twice as strongly as wheat flour, so 1 tablespoon of cornstarch replaces 2 tablespoons of flour in a sauce.
1 cup cornstarch (cornflour) = 128 g · 1 tbsp = 8 g · 100 g = 0.78 cups
Based on 128 g per US cup of cornstarch (cornflour), spooned and levelled. Real-world cups vary by about ±10 % for powders.
How to measure cornstarch (cornflour)
Spoon and level. For slurries, 1 tablespoon (8 g) in 2 tablespoons cold water thickens about 250 mL of liquid.
Weight is the only measure that does not depend on the container or on how the ingredient was filled. The figure of 128 g per US cup comes from USDA FoodData Central; other charts differ by a few percent, which is within the spread between two cooks filling the same cup.
Cups of cornstarch (cornflour) to grams
| Cups | Volume | Weight | Ounces |
|---|---|---|---|
| ⅛ cup | 30 mL | 16 g | 0.6 oz |
| ¼ cup | 59 mL | 32 g | 1.1 oz |
| ⅓ cup | 79 mL | 43 g | 1.5 oz |
| ½ cup | 118 mL | 64 g | 2.3 oz |
| ⅔ cup | 158 mL | 85 g | 3 oz |
| ¾ cup | 177 mL | 96 g | 3.4 oz |
| 1 cup | 237 mL | 128 g | 4.5 oz |
| 1½ cups | 355 mL | 192 g | 6.8 oz |
| 2 cups | 473 mL | 256 g | 9 oz |
| 3 cups | 710 mL | 384 g | 13.5 oz |
| 4 cups | 946 mL | 512 g | 18.1 oz |
Spoons and metric measures
| Measure | Weight |
|---|---|
| 1 teaspoon | 2.7 g |
| 1 tablespoon | 8 g |
| 2 tablespoons | 16 g |
| 4 tablespoons (¼ cup) | 32 g |
| Metric cup, 250 mL | 135 g |
| 100 mL | 54 g |
Grams of cornstarch (cornflour) to cups
| Weight | US cups | Tablespoons | Ounces |
|---|---|---|---|
| 25 g | 0.2 cups | 3.1 tbsp | 0.88 oz |
| 50 g | 0.39 cups | 6.3 tbsp | 1.76 oz |
| 75 g | 0.59 cups | 9.4 tbsp | 2.65 oz |
| 100 g | 0.78 cups | 12.5 tbsp | 3.53 oz |
| 125 g | 0.98 cups | 15.6 tbsp | 4.41 oz |
| 150 g | 1.17 cups | 18.8 tbsp | 5.29 oz |
| 200 g | 1.56 cups | 25 tbsp | 7.05 oz |
| 250 g | 1.95 cups | 31.3 tbsp | 8.82 oz |
| 300 g | 2.34 cups | 37.5 tbsp | 10.58 oz |
| 400 g | 3.13 cups | 50 tbsp | 14.11 oz |
| 500 g | 3.91 cups | 62.5 tbsp | 17.64 oz |
Related ingredients
Frequently asked questions
About 128 g when spooned into the cup and levelled. Source: USDA FoodData Central.
100 g of cornstarch (cornflour) is 0.78 US cups, or about 12.5 tablespoons.
8 g, since a US tablespoon is one sixteenth of a cup. A teaspoon is 2.7 g.
No. This page uses the US cup of 236.6 mL. The metric cup of 250 mL used in Australia, New Zealand and most of Europe holds 135 g of cornstarch (cornflour), about 6 % more. Old British recipes used a 284 mL cup.