1 cup of cornstarch in grams

1 cup of cornstarch weighs about 128 grams.

Grams128 g
Ounces4.52 oz
Tablespoons16 tbsp
Teaspoons48 tsp
Milliliters (volume)237 ml

This is based on 1 cup of cornstarch = 128 g, so 1 cup of cornstarch is 1 × 128 ≈ 128 g.

Cornstarch is usually measured by the tablespoon for thickening. A slurry of 1 tablespoon mixed with cold water thickens about a cup of liquid.

Other amounts of cornstarch

Full cornstarch conversion chart →