Cups & Temps

How many grams in a cup of cornstarch?

One US cup of cornstarch weighs about 128 grams (4.52 oz). A tablespoon is about 8 g and a teaspoon about 2.7 g.

1 cup
128 gUSDA FDC SR Legacy 169698 'Cornstarch': 1 cup = 128 g
1 tablespoon
8 g1/16 cup
1 teaspoon
2.7 g1/48 cup
100 grams
0.781 cup12.5 tablespoons

Weights from USDA FoodData Central and King Arthur Baking. Checked .

Convert cornstarch

Change the amount or units; the ingredient is already set.

128grams

1 cup of cornstarch = 128 grams

    Cornstarch cups to grams chart

    CupsGramsOunces
    1/8 cup16 g0.564 oz
    1/4 cup32 g1.13 oz
    1/3 cup42.7 g1.51 oz
    1/2 cup64 g2.26 oz
    2/3 cup85.3 g3.01 oz
    3/4 cup96 g3.39 oz
    1 cup128 g4.52 oz
    1 1/2 cups192 g6.77 oz
    2 cups256 g9.03 oz
    3 cups384 g13.5 oz
    4 cups512 g18.1 oz

    Cornstarch grams to cups

    GramsCupsTablespoons
    25 g0.195 cups3.12 tbsp
    50 g0.391 cups6.25 tbsp
    100 g0.781 cups12.5 tbsp
    125 g0.977 cups15.6 tbsp
    150 g1.17 cups18.8 tbsp
    200 g1.56 cups25 tbsp
    250 g1.95 cups31.2 tbsp
    300 g2.34 cups ≈ 2 1/3 cup37.5 tbsp
    400 g3.12 cups ≈ 3 1/8 cup50 tbsp
    500 g3.91 cups62.5 tbsp
    1000 g7.81 cups125 tbsp

    How we got 128 g

    USDA FDC SR Legacy 169698 'Cornstarch': 1 cup = 128 g.

    • King Arthur (1/4 cup = 28 g, scaled x4): 112 g per cup

    Very fine, compressible powder; spooned vs scooped differs considerably (sources disagree ~13%).

    Questions people ask

    How many cups is 100 grams of cornstarch?

    About 0.781 cups (12.5 tablespoons).

    How many grams is 1/2 cup of cornstarch?

    About 64 grams.

    Sources