2 cups of cornstarch in ounces
2 cups of cornstarch ≈ 9.03 oz = 256 g · 473 mL by volume · at 128 g per cup, spooned and leveled. Use the converter below for any amount or ingredient.
Result: …
Formula
grams = cups × 128 (cornstarch) ; ounces = grams ÷ 28.3495
Why weight beats volume for cornstarch
A cup is a volume; a recipe cares about mass. Cornstarch runs about 128 g per US cup measured spoon-and-level, but packing, humidity, and grind can move that by ±10%. Weighing removes the guesswork, which is exactly why serious baking recipes list grams.
Cornstarch: cups to ounces table
| Amount | Grams | Ounces |
|---|---|---|
| ¼ cup | 32 g | 1.13 oz |
| ⅓ cup | 43 g | 1.51 oz |
| ½ cup | 64 g | 2.26 oz |
| ⅔ cup | 85 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 (this page) | 256 g | 9.03 oz |
| 3 cups | 384 g | 13.55 oz |
Frequently asked questions
How many ounces is 2 cups of cornstarch?
2 cups of cornstarch is about 9.03 oz (256 g), based on 128 g per US cup, measured spoon-and-level.
Why does the ingredient change the answer?
Cups measure volume, grams measure weight. Dense ingredients pack more weight into the same cup: a cup of honey is 340 g while a cup of rolled oats is only 90 g. That is why generic cup-to-gram converters get recipes wrong.
Does it matter how I fill the cup?
Yes, these figures assume you spoon the ingredient into the cup and level it off. Scooping, packing, or tapping the cup can change the weight by 10% or more, which is why bakers prefer a scale.
Is this a US cup or a metric cup?
A US customary cup (236.6 mL). A metric cup is 250 mL, about 5.7% bigger, and old UK recipes use a 284 mL imperial cup. 2 cups here is 473 mL by volume.