Cornstarch Cups to Grams
Convert any amount of cornstarch between cups and grams. 1 cup of cornstarch equals 128.00 g. Use the calculator for custom amounts, or choose an amount below.
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Common cornstarch measurements found in recipes.
Other Units for Cornstarch
Convert cornstarch from cups to other units. Each link has its own calculator and conversion amounts.
Similar Ingredients
Measuring Tip
Cornstarch clumps when exposed to moisture. Store it sealed and stir or sift before measuring for accurate results.
Understanding the Units
What is a Cup?
In US cooking, a cup measures volume, not weight. One standard US cup holds 236.588 ml of liquid. Because different ingredients have different densities, a cup of one ingredient can weigh very differently from a cup of another.
What is a Gram?
Weighing ingredients in grams eliminates the variability of volume measurements. A cup of flour can weigh anywhere from 120g to 160g depending on how it was scooped, but 120g of flour is always 120g of flour.
Frequently Asked Questions
1 cup of cornstarch equals 128.00 g. The result scales proportionally for other amounts - choose an amount below or enter any quantity in the calculator.
The most accurate way is to weigh cornstarch on a kitchen scale. If you are measuring by volume, sift or whisk the flour first to break up clumps, then spoon it into the measuring cup and level it off. Do not scoop directly from the bag, which compacts the flour and can increase the weight by 20-30%.
Close, but not exactly. The cups to grams conversion for cornstarch may vary slightly between brands depending on moisture content and how the ingredient is measured.
Weighing is more consistent than volume measuring. A cup of cornstarch can vary by 10-20% depending on how it's scooped, packed, or leveled. Weighing gives the same result every time, which is especially important in baking where precision affects texture and rise.