How Much Is 5 Cups of Cornstarch in Ounces?
5 cups of cornstarch weighs 22.58 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 5 cups.
Formula and Step-by-Step
- Start with 5 cups of cornstarch
- 1 cup of cornstarch = 128g
- 5 × 128 = 640g
- Convert grams to ounces: 640 ÷ 28.3495 = 22.58 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 (5 cups) is highlighted.
For reference, 5 cups of cornstarch (640g) is close in weight to a basketball (624g).
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?
In US cooking, a cup measures volume, not weight. One standard US cup holds 236.588 ml of liquid. Because different ingredients have different densities, a cup of one ingredient can weigh very differently from a cup of another.
What is an Ounce?
Ounces are commonly used in US recipes for cheese, meat, chocolate, and other ingredients sold by weight. Many kitchen scales offer both gram and ounce readings.