How Much Is 2.21 Cups of Cornstarch in Ounces?
Converting 2.21 cups of cornstarch to ounces gives 9.98 oz. One cup of cornstarch weighs 128g, so 2.21 cups is 2.21 × 128 = 282.88g (9.98 oz). This conversion is specific to cornstarch because each ingredient has a different density.
Formula and Step-by-Step
- Start with 2.21 cups of cornstarch
- 1 cup of cornstarch = 128g
- 2.21 × 128 = 282.88g
- Convert grams to ounces: 282.88 ÷ 28.3495 = 9.98 oz
The same formula works for any amount. Multiply (or divide) by the density, then convert units as needed.
Measuring Tip
Different flour types have very different weights per cup. Always check the specific flour your recipe calls for rather than using a generic "flour" conversion.
Cornstarch at Different Amounts
How cornstarch scales across common cups measurements. Your amount (2.21 cups) is highlighted.
For reference, 2.21 cups of cornstarch (282.88g) is close in weight to a can of soup (305g).
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 |
| 2.21 cups | 9.98 oz | 10.54 oz | 11.98 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?
An ounce (oz) is a US customary unit of weight equal to 28.3495 grams or 1/16 of a pound. In cooking, "ounces" refers to weight (avoirdupois ounces), not fluid ounces which measure volume.