How Much Is 12 Ounces of Cornstarch in Tablespoons?
12 ounces of cornstarch equals 42.52 tbsp. Cornstarch has a density of 128g per cup. A lighter ingredient like cocoa powder (86g/cup) would fill even more volume at the same weight, which is why ingredient-specific conversions matter.
Formula and Step-by-Step
- Start with 12 ounces of cornstarch
- Convert ounces to grams: 12 × 28.35 = 340.19g
- 1 cup of cornstarch = 128g
- 340.19g ÷ 128g/cup = 2.66 cups × 16 = 42.52 tablespoons
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 ounces measurements. Your amount (12 ounces) is highlighted.
Other Amounts of Cornstarch
| Ounces | US Tablespoons | Metric Tablespoon | Australian Tablespoon |
|---|---|---|---|
| 1 ounce | 3.54 tbsp | 3.49 tbsp | 2.62 tbsp |
| 2 ounces | 7.09 tbsp | 6.99 tbsp | 5.24 tbsp |
| 3 ounces | 10.63 tbsp | 10.48 tbsp | 7.86 tbsp |
| 4 ounces | 14.17 tbsp | 13.97 tbsp | 10.48 tbsp |
| 5 ounces | 17.72 tbsp | 17.47 tbsp | 13.10 tbsp |
| 6 ounces | 21.26 tbsp | 20.96 tbsp | 15.72 tbsp |
| 8 ounces | 28.35 tbsp | 27.95 tbsp | 20.96 tbsp |
| 10 ounces | 35.44 tbsp | 34.93 tbsp | 26.20 tbsp |
| 12 ounces | 42.52 tbsp | 41.92 tbsp | 31.44 tbsp |
| 16 ounces | 56.70 tbsp | 55.89 tbsp | 41.92 tbsp |
Understanding the Units
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.
What is a Tablespoon?
Tablespoon sizes differ by country. A US tablespoon is 14.787 ml, close to the 15 ml metric standard used in most countries. An Australian tablespoon is 20 ml, about 35% larger than US. An imperial tablespoon is 17.758 ml. If your recipe comes from Australia, the larger tablespoon size can make a real difference.