How Much Is 1 Cup of Cornstarch in Grams?
1 cup of cornstarch equals 128.00 g. Cornstarch has a density of 128g per cup (128g per cup), which means it's relatively light compared to other common cooking ingredients. For comparison, 1 cup of honey would be 340 g.
Formula and Step-by-Step
- Start with 1 cup of cornstarch
- 1 cup of cornstarch = 128g
- 1 × 128 = 128g
The same formula works for any amount. Multiply (or divide) by the density, then convert units as needed.
Mental Math Shortcut
For 1 cup of cornstarch, just remember: 128g. Double it for 2 cups (256g), halve it for a half cup (64g).
Measuring Tip
For the most consistent results, weigh cornstarch on a kitchen scale. Volume measurements can vary by 20-30% depending on how the flour is scooped.
Cornstarch at Different Amounts
How cornstarch scales across common cups measurements. Your amount (1 cup) is highlighted.
For reference, 1 cup of cornstarch (128g) is close in weight to a small apple (130g).
Other Amounts of Cornstarch
| Cups | US Grams | Metric Cup | Imperial Cup |
|---|---|---|---|
| 0.25 cups | 32.00 g | 33.81 g | 38.43 g |
| 0.33 cups | 42.24 g | 44.63 g | 50.73 g |
| 0.5 cups | 64.00 g | 67.63 g | 76.86 g |
| 0.75 cups | 96.00 g | 101.44 g | 115.29 g |
| 1 cup | 128.00 g | 135.26 g | 153.72 g |
| 1.5 cups | 192.00 g | 202.88 g | 230.58 g |
| 2 cups | 256.00 g | 270.51 g | 307.44 g |
| 3 cups | 384.00 g | 405.77 g | 461.17 g |
| 4 cups | 512.00 g | 541.02 g | 614.89 g |
| 5 cups | 640.00 g | 676.28 g | 768.61 g |
Understanding the Units
What is a Cup?
A cup is a US customary unit of volume equal to 236.588 milliliters or 8 fluid ounces. It is the most common volume measurement in American recipes. One cup can be divided into 16 tablespoons or 48 teaspoons.
What is a Gram?
Grams are the preferred unit in professional kitchens and bakeries because they allow exact recipe scaling. To double a recipe, simply double the gram values. No need to worry about how tightly an ingredient is packed into a cup.