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Ingredient guide / cornstarch

Cornstarch
grams to cups.

A cornstarch grams-to-cups reference using King Arthur Baking's 28g per ¼-cup entry, normalized transparently to a full US cup.

Density reference112g

per 1 cup · dry powder, normalized from ¼ cup

Convert an amount
Scale or convert a recipe See the full printable chart Compare density across ingredients Cornstarch cups to grams Why a cup is not one number Read the full measuring guide

Common cornstarch conversions

30 grams0.27 cupsless than a cup
50 grams0.45 cupsless than a cup
80 grams0.71 cupsless than a cup
100 grams0.89 cupsless than a cup
120 grams1.07 cupscup measure
150 grams1.34 cupscup measure
200 grams1.79 cupscup measure
250 grams2.23 cupscup measure
500 grams4.46 cupscup measure
Measurement source

King Arthur lists Cornstarch at ¼ cup = 28g; PantryGauge normalizes that stated measure to 112g per cup by exact 4× arithmetic.

Read King Arthur Baking Ingredient Weight Chart

Ingredient questions

Cornstarch FAQ.

How many grams are in a cup of cornstarch?

King Arthur Baking lists 28g for ¼ cup. PantryGauge normalizes that exact chart measure to 112g per US cup by multiplying the stated quarter-cup amount by four.

Should cornstarch be packed?

No. Spoon it lightly into the measure and level the surface. Packing creates a denser result than the chart reference.

Can I measure cornstarch by volume in a sauce?

Yes for small amounts, but tablespoons and teaspoons are easier to control. Use the ingredient's own reference rather than a flour conversion.