All ingredient weights
Baking & flours

Cornstarch: weights & conversions

A US cup of cornstarch weighs about 128 g. 100 g is 381 calories and 0.26 g of protein.

Also written as: corn starch.

Convert any amount

Not one of the amounts below? Type your own and convert it instantly.

1 cup of cornstarch is about 128 grams.

Cups to grams

What each measure of cornstarch weighs, from the cup weight above.

cornstarch volume conversions
VolumeGramsOunces
1 cup128 g4.52 oz
3/4 cup96 g
2/3 cup85.3 g
1/2 cup64 g
1/3 cup42.7 g
1/4 cup32 g
1 tablespoon8 g
1 teaspoon2.67 g

Ounces and pounds

The weights an older recipe card is most likely to use.

cornstarch weight conversions
WeightGramsOunces
1 oz28.3 g
4 oz (1/4 lb)113 g
8 oz (1/2 lb)227 g
1 lb454 g
100 g100 g

Nutrition

Per 100 g of edible portion, transcribed from USDA reference data, and scaled to the measures above.

Nutrition for cornstarch by measure
MeasureCaloriesProteinFatCarbsFiberSodium
Per 100 g (100 g)3810.26 g0.05 g91.3 g0.9 g9 mg
Per cup (128 g)4880.33 g0.06 g117 g1.15 g12 mg
Per tablespoon (8 g)300.02 g0 g7.3 g0.07 g1 mg
Per 4 oz (113 g)4320.29 g0.06 g104 g1.02 g10 mg

If you have run out

  • Two tablespoons of all-purpose flour for every tablespoon of cornstarch, whisked into cold liquid first.

Free recipes that use cornstarch

From our starter library — free to read, free to save into your own cookbook.

Common questions

How many grams are in a cup of cornstarch?
One US cup of cornstarch weighs about 128 g (4.52 oz). A tablespoon is about 8 g and a teaspoon about 2.67 g.
How many cups is 100 g of cornstarch?
100 g of cornstarch is about 0.78 cups — near enough to 3/4 of a cup in a measuring cup.
How many calories are in cornstarch?
Cornstarch has about 381 calories per 100 g, which works out to roughly 488 calories a cup.
What can I use instead of cornstarch?
Two tablespoons of all-purpose flour for every tablespoon of cornstarch, whisked into cold liquid first.

More from baking & flours

The recipe card never said grams. Ours will.

Scan a handwritten recipe card and we type it up, work out the weights, and keep it in a cookbook your whole family shares — with the photos and stories behind it. Free to start.