Home › Ingredients › Cornstarch

Cornstarch grams to cups

One US cup of cornstarch weighs 128 g, a tablespoon 8 g and a teaspoon 2.67 g. So 100 g of cornstarch is ⅔ cup + 2 tbsp (0.781 cups).

100 grams of cornstarch = 0.781 cups

Measure it: ⅔ cup + 2 tbsp

Ingredient

Metric cup (250 ml)

Cornstarch grams to cups chart

Grams	US cups	How to measure	Tablespoons
25 g	0.195	heaping 3 tbsp	3.13
50 g	0.391	⅓ cup + 1 tbsp	6.25
75 g	0.586	½ cup + 1 tbsp + 1 tsp	9.37
100 g	0.781	⅔ cup + 2 tbsp	12.5
125 g	0.977	scant 1 cup	15.6
150 g	1.17	1 ⅛ cups + 1 tbsp	18.7
200 g	1.56	1 ½ cups + 1 tbsp	25
250 g	1.95	1 ¾ cups + 3 tbsp	31.2
300 g	2.34	2 ⅓ cups	37.5
400 g	3.13	3 ⅛ cups	50
500 g	3.91	3 ¾ cups + 2 tbsp	62.5
1000 g	7.81	7 ¾ cups	125

Cups of cornstarch to grams

Cups	Grams	Ounces
⅛ cup	16 g	0.564 oz
¼ cup	32 g	1.13 oz
⅓ cup	42.7 g	1.51 oz
½ cup	64 g	2.26 oz
⅔ cup	85.3 g	3.01 oz
¾ cup	96 g	3.39 oz
1 cup	128 g	4.52 oz
1½ cups	192 g	6.77 oz
2 cups	256 g	9.03 oz
3 cups	384 g	13.5 oz
4 cups	512 g	18.1 oz

Where 128 g comes from

USDA FoodData Central: 1 cup of “Cornstarch” = 128 g. FDC 169698

King Arthur Baking ingredient weight chart (“Cornstarch”): 112 g per cup. Chart

This page uses 128 g (USDA). The two sources differ by 16 g (12.5%): that gap is about how firmly the cup is filled, not an error in either.

A cup of cornstarch is 128 g in USDA's data; King Arthur's ¼ cup at 28 g works out to 112 g. Recipes usually ask for spoons: 1 tablespoon is about 8 g. In the UK it is called cornflour, which is not the same as US cornmeal.

How to measure cornstarch by the cup

Stir it to loosen, spoon it into a dry measuring cup until heaped, then sweep the top level with the back of a knife. Do not tap or press the cup.

In the UK and Australia: cornflour. Metric cups there hold 250 ml, so a metric cup of cornstarch weighs about 135 g.

Questions

How many cups is 100 g of cornstarch?

⅔ cup + 2 tbsp (0.781 cups), measured the spoon-and-level way.

How many grams is 1 cup of cornstarch?

128 g according to USDA FoodData Central; King Arthur's chart says 112 g.

How many grams in a tablespoon of cornstarch?

About 8 g; a teaspoon is 2.67 g.

How many cups is 500 g of cornstarch?

3 ¾ cups + 2 tbsp (3.91 cups).