How Much Is 2 Cups of Cornstarch in Ounces?
2 cups of cornstarch weighs 9.03 oz. This is based on cornstarch having a density of 128g per cup. Because cups measure volume and ounces measure weight, the result depends on the ingredient, and a different ingredient would give a different result for the same 2 cups.
Formula and Step-by-Step
- Start with 2 cups of cornstarch
- 1 cup of cornstarch = 128g
- 2 × 128 = 256g
- Convert grams to ounces: 256 ÷ 28.3495 = 9.03 oz
The same formula works for any amount. Multiply (or divide) by the density, then convert units as needed.
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 (2 cups) is highlighted.
For reference, 2 cups of cornstarch (256g) is close in weight to a cup of water (237g).
Other Amounts of Cornstarch
| Cups | US Ounces | Metric Cup | Imperial Cup |
|---|---|---|---|
| 0.25 cups | 1.13 oz | 1.19 oz | 1.36 oz |
| 0.33 cups | 1.49 oz | 1.57 oz | 1.79 oz |
| 0.5 cups | 2.26 oz | 2.39 oz | 2.71 oz |
| 0.75 cups | 3.39 oz | 3.58 oz | 4.07 oz |
| 1 cup | 4.52 oz | 4.77 oz | 5.42 oz |
| 1.5 cups | 6.77 oz | 7.16 oz | 8.13 oz |
| 2 cups | 9.03 oz | 9.54 oz | 10.84 oz |
| 3 cups | 13.55 oz | 14.31 oz | 16.27 oz |
| 4 cups | 18.06 oz | 19.08 oz | 21.69 oz |
| 5 cups | 22.58 oz | 23.86 oz | 27.11 oz |
Understanding the Units
What is a Cup?
The US cup (236.588 ml) is slightly smaller than the metric cup used in Australia and some other countries (250 ml). When following recipes from different countries, check which cup standard is being used.
What is an Ounce?
Weight ounces and fluid ounces are different measurements. A fluid ounce measures volume (29.574 ml), while an ounce measures weight (28.35g). They only align for water, where 1 fl oz weighs approximately 1 oz.