How Much Is 1 Teaspoon of Cornstarch in Ounces?
1 teaspoon of cornstarch weighs 0.09 oz. This is based on cornstarch having a density of 128g per cup. Because teaspoons measure volume and ounces measure weight, the result depends on the ingredient, and a different ingredient would give a different result for the same 1 teaspoon.
Formula and Step-by-Step
- Start with 1 teaspoon of cornstarch
- 1 teaspoon of cornstarch = 2.67g
- 1 × 2.67 = 2.67g
- Convert grams to ounces: 2.67 ÷ 28.3495 = 0.09 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 teaspoons measurements. Your amount (1 teaspoon) is highlighted.
For reference, 1 teaspoon of cornstarch (2.67g) is close in weight to a US penny (2.5g).
Other Amounts of Cornstarch
| Teaspoons | US Ounces | Metric Teaspoon | Imperial Teaspoon |
|---|---|---|---|
| 0.25 teaspoons | 0.02 oz | 0.02 oz | 0.03 oz |
| 0.5 teaspoons | 0.05 oz | 0.05 oz | 0.06 oz |
| 1 teaspoon | 0.09 oz | 0.10 oz | 0.11 oz |
| 1.5 teaspoons | 0.14 oz | 0.14 oz | 0.17 oz |
| 2 teaspoons | 0.19 oz | 0.19 oz | 0.23 oz |
| 3 teaspoons | 0.28 oz | 0.29 oz | 0.34 oz |
| 4 teaspoons | 0.38 oz | 0.38 oz | 0.45 oz |
| 5 teaspoons | 0.47 oz | 0.48 oz | 0.56 oz |
| 6 teaspoons | 0.56 oz | 0.57 oz | 0.68 oz |
| 8 teaspoons | 0.75 oz | 0.76 oz | 0.90 oz |
Understanding the Units
What is a Teaspoon?
A US teaspoon is 4.929 ml, a metric teaspoon is exactly 5 ml, and an imperial teaspoon is 5.919 ml. The metric and US versions are nearly identical (1.4% difference), but the imperial teaspoon is 20% larger. For most spices the difference is negligible, but for leaveners like baking powder it can affect the result.
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.