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Cooking conversion
Cups of Cornstarch to Grams
How many grams are in cups of cornstarch? Type a value below to see the result instantly. Cooking conversions depend on the density of each ingredient — the math here uses 0.541 g/mL for cornstarch.
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1 cup of cornstarch = 127.99 g
Cups of Cornstarch to Grams Conversion Table
Common values for cornstarch:
| Cups of cornstarch | Grams |
|---|---|
| 0.25 cup | 31.9985 g |
| 0.5 cup | 63.9971 g |
| 1 cup | 127.99 g |
| 2 cup | 255.99 g |
| 3 cup | 383.98 g |
| 4 cup | 511.98 g |
| 5 cup | 639.97 g |
| 8 cup | 1023.95 g |
| 10 cup | 1279.94 g |
How this works
Cornstarch has a density of about 0.541 g/mL (king arthur baking: 1 cup = 128g). That means 1 mL of cornstarch weighs 0.541 grams.
Grams = cups × 127.9941
Note: Spooned and leveled.
Why a cup of cornstarch doesn't always weigh the same
Volume measurements are forgiving in some ways and brutal in others. A cup of cornstarch can vary by 10-20% in weight depending on how it's measured: spooned vs scooped, packed vs loose, sifted vs unsifted. The density figure used here matches the most common published recipe conventions, but if you're after baking precision, weighing on a kitchen scale is more accurate than measuring by volume.