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Grams of Cornstarch to Cups

1 US cup of cornstarch weighs 128 grams (g), or 4.5 ounces (oz), so 100 grams of cornstarch equals 0.78 cups. To convert grams of cornstarch to cups, divide the grams by 128.

Cornstarch weighs about 128 grams per US cup, close to flour in density. Spoon it into the cup and level off, since it packs and clumps easily in a humid kitchen.

Cornstarch in the US is the same product sold as cornflour in the UK and Australia. 1 US cup weighs 128 g.

This page covers the cornstarch grams to cups calculator, a chart from 10 g to 1,000 g, 6 common gram amounts, a cups to grams chart, 4 measuring steps, and a comparison with 8 other baking ingredients.

1 cup
128 g
4.5 oz
½ cup
64 g
2.3 oz
1 tablespoon (tbsp)
8 g
1 tsp = 2.7 g
100 g
0.78 cups
¾ cup + 0.5 tbsp

Cornstarch Grams to Cups Calculator

Enter grams of cornstarch to get cups, tablespoons, milliliters (ml), ounces, and pounds. The calculator uses 128 g per US cup (236.6 ml).

Tip: Preset to cornstarch. Select another ingredient to compare.

g
Precision
Cup size 1 US cup = 236.6 ml
Cornstarch
0.78
US cups

100g = 0.78 cups (≈ ¾ cup)

12.50
Tablespoons
184.83
Millilitres
3.53
Ounces
0.22
Pounds
Formula 100 g ÷ 128 g/cup = 0.78 cups

Cornstarch Grams to Cups Conversion Chart

The cornstarch grams to cups chart converts 24 amounts from 10 g to 1,000 g into cups, a cup measure with tablespoons, teaspoons (tsp), and ounces. The highlighted row equals 1 US cup.

Grams Cups Cup measure Tbsp Tsp Oz
10 g 0.08 1.5 tbsp 1.3 3.8 0.4
15 g 0.12 2 tbsp 1.9 5.6 0.5
20 g 0.16 2.5 tbsp 2.5 7.5 0.7
25 g 0.2 3 tbsp 3.1 9.4 0.9
30 g 0.23 ¼ cup 3.8 11.3 1.1
50 g 0.39 ⅓ cup + 1 tbsp 6.3 18.8 1.8
60 g 0.47 ½ cup 7.5 22.5 2.1
75 g 0.59 ½ cup + 1.5 tbsp 9.4 28.1 2.6
100 g 0.78 ¾ cup + 0.5 tbsp 12.5 37.5 3.5
120 g 0.94 ¾ cup + 3 tbsp 15 45 4.2
125 g 0.98 1 cup 15.6 46.9 4.4
128 g 1 1 cup 16 48 4.5
150 g 1.17 1 cup + 3 tbsp 18.8 56.3 5.3
175 g 1.37 1 ⅓ cups + 0.5 tbsp 21.9 65.6 6.2
200 g 1.56 1 ½ cups + 1 tbsp 25 75 7.1
225 g 1.76 1 ¾ cups 28.1 84.4 7.9
250 g 1.95 1 ¾ cups + 3.5 tbsp 31.3 93.8 8.8
300 g 2.34 2 ⅓ cups 37.5 112.5 10.6
350 g 2.73 2 ¾ cups 43.8 131.3 12.3
400 g 3.13 3 cups + 2 tbsp 50 150 14.1
450 g 3.52 3 ½ cups + 0.5 tbsp 56.3 168.8 15.9
500 g 3.91 3 ¾ cups + 2.5 tbsp 62.5 187.5 17.6
750 g 5.86 5 ¾ cups + 2 tbsp 93.8 281.3 26.5
1,000 g 7.81 7 ¾ cups + 1 tbsp 125 375 35.3

Values use US cups and the measuring method in the steps below. Cup measures round to the nearest ½ tablespoon.

How Many Cups Is 100, 200, 250, or 500 Grams of Cornstarch?

6 common recipe amounts of cornstarch convert to cups as follows, with the cup and tablespoon measure for each.

Cornstarch Cups to Grams Chart

The cornstarch cups to grams chart lists the weight of 13 US measures, from 1 teaspoon to 4 cups, in grams and ounces.

US measure Grams Ounces
1 teaspoon 2.7 g 0.1 oz
1 tablespoon 8 g 0.3 oz
⅛ cup 16 g 0.6 oz
¼ cup 32 g 1.1 oz
⅓ cup 42.7 g 1.5 oz
½ cup 64 g 2.3 oz
⅔ cup 85.3 g 3 oz
¾ cup 96 g 3.4 oz
1 cup 128 g 4.5 oz
1 ½ cups 192 g 6.8 oz
2 cups 256 g 9 oz
3 cups 384 g 13.5 oz
4 cups 512 g 18.1 oz

Convert any cup amount with the cups to grams converter.

How to Measure Cornstarch Accurately

To measure cornstarch accurately, use the spoon-and-level method: loosen it, spoon it into a dry measuring cup, and level the top. Scooping the cup straight into the bag packs cornstarch down and adds weight.

  1. 1

    Loosen the powder

    Stir or whisk the cornstarch in its container to break up clumps and settled layers.

  2. 2

    Spoon it into a dry measuring cup

    Spoon it in lightly until the cup overflows. Do not tap, shake, or press the cup.

  3. 3

    Level the top

    Sweep a straight edge, such as the back of a knife, across the rim to remove the excess.

  4. 4

    Weigh it for an exact amount

    Set a bowl on a kitchen scale, press tare, and add cornstarch until the scale shows the gram amount in the recipe.

Cornstarch vs Other Baking Ingredients: Grams per Cup

Of 8 other baking ingredients, 1 weigh less per cup than cornstarch and 7 weigh more. Swap baking ingredients by weight, not by cup, since the same cup holds a different number of grams.

Ingredient Grams per cup vs cornstarch 100 g in cups
Cocoa powder 84 g −44 g 1.19
Cornstarch 128 g — 0.78
Dry yeast 150 g +22 g 0.67
Chocolate chips 170 g +42 g 0.59
Baking powder 192 g +64 g 0.52
Baking soda 220 g +92 g 0.45
Peanut butter 258 g +130 g 0.39
Salt (table) 288 g +160 g 0.35
Jam 320 g +192 g 0.31

Cornstarch Grams to Cups FAQ

How many grams are in 1 cup of cornstarch?
1 US cup of cornstarch weighs 128 grams (4.5 oz). ½ cup weighs 64 g, and ¼ cup weighs 32 g.
How many cups is 100 grams of cornstarch?
100 grams of cornstarch is 0.78 cups, or ¾ cup + 0.5 tbsp with a standard measuring cup set. 100 g equals 12.5 tablespoons and 3.5 oz.
How many cups is 200 grams of cornstarch?
200 grams of cornstarch is 1.56 cups, or 1 ½ cups + 1 tbsp with a standard measuring cup set. 200 g equals 25 tablespoons and 7.1 oz.
How many cups is 250 grams of cornstarch?
250 grams of cornstarch is 1.95 cups, or 1 ¾ cups + 3.5 tbsp with a standard measuring cup set. 250 g equals 31.3 tablespoons and 8.8 oz.
How many cups is 500 grams of cornstarch?
500 grams of cornstarch is 3.91 cups, or 3 ¾ cups + 2.5 tbsp with a standard measuring cup set. 500 g equals 62.5 tablespoons and 17.6 oz.
How many grams of cornstarch are in 1 tablespoon?
1 tablespoon of cornstarch weighs 8 g, and 1 teaspoon weighs 2.7 g. A US cup holds 16 tablespoons and 48 teaspoons.
What is 2 cups of cornstarch in grams?
2 cups of cornstarch is 256 grams (9 oz). 3 cups is 384 g, and 4 cups is 512 g.
Does 1 cup of cornstarch weigh the same as 1 cup of water?
No, 1 cup of cornstarch weighs 128 g and 1 cup of water weighs 236.6 g. A cup of cornstarch is 108.6 g lighter than a cup of water.
Is cornstarch the same as cornflour?
Yes, cornstarch in the US is the same product sold as cornflour in the UK and Australia. 1 US cup weighs 128 g.
Is it better to measure cornstarch in grams or cups?
Grams are more accurate for cornstarch. A kitchen scale reads the same weight every time, while a cup of cornstarch changes weight with packing, settling, and how the cup is filled.

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