How many grams in 1 cup of cornstarch?
1 cup of cornstarch weighs about 128 grams (4.5 oz). A fine powder that packs more than you might expect.
Cups to grams, for your ingredient
A cup of flour and a cup of honey weigh very differently. Pick the ingredient, enter the amount, and read it in any unit.
Weights are typical averages (US cup, 240 ml). Packing and brand change them by a few percent, so for baking a kitchen scale is more exact.
About cornstarch
A fine starch from corn, used to thicken sauces, tenderise cakes and crisp coatings.
Measuring tips for cornstarch
- Mix it with cold liquid before adding to hot food to avoid lumps.
- Spoon and level it, because it compacts.
- Use about half as much as flour when thickening.
What can replace cornstarch?
Arrowroot or potato starch can replace cornstarch in many sauces.
Related guides
Why a Cup of Flour Weighs Different Amounts
How to Convert a Recipe from Cups to Grams, Step by Step
Kitchen Scale Buying GuideFrequently asked questions
How many grams are in 1 cup of cornstarch?
About 128 grams using a US cup of 240 ml.
How many grams are in 1/2 cup of cornstarch?
About 64 grams.
How much does 1 tablespoon of cornstarch weigh?
About 8 grams.
Why does my result differ from other sites?
Packing, humidity and brand change the weight by a few percent. We use typical averages, so a scale is the most accurate option.