Cornstarch in grams
128 grams
1 US cup = 236.6 ml
At a glance
| Amount | Weight (g) |
|---|---|
| 1 US teaspoon (4.9 ml) | 2.7 grams |
| 1 US tablespoon (14.8 ml) | 8 grams |
| 1 US cup (236.6 ml) | 128 grams |
| 1 metric cup (250 ml) | 135 grams |
| 100 milliliters | 54 grams |
Other ingredients
Questions
How many grams is a tablespoon of cornstarch?
A 15 ml tablespoon holds about 8.1 g of cornstarch and a US tablespoon (14.8 ml) about 8 g. A 5 ml teaspoon holds about 2.7 g.
How many grams is a cup of cornstarch?
A US cup (236.6 ml) of cornstarch weighs 128 g. A metric cup (250 ml) weighs about 135 g.
Is cornflour the same as cornstarch?
In the UK, yes: “cornflour” is cornstarch. In the US, “corn flour” is finely ground corn, a different product. Check which one a recipe means.
How much cornstarch thickens a sauce?
As a rule of thumb, about one tablespoon thickens a cup (240 ml) of liquid to a light sauce. Mix it with cold liquid first, then stir it into the hot sauce.
Can I replace cornstarch with flour?
Yes, but use about twice as much flour as cornstarch, and cook it longer to lose the raw taste. The sauce will be less clear.
A US cup of cornstarch weighs 128 g according to the USDA. A 15 ml tablespoon holds about 8.1 g and a 5 ml teaspoon about 2.7 g.
Cornstarch is the thickener behind most sauces, custards and fruit fillings. It is called cornflour in the UK, and “maïzena” in France after the brand.
USDA FoodData Central #169698 (SR Legacy, checked 2026-10-19)