How Much Is 18.9 Teaspoons of All-Purpose Flour in Ounces?
18.9 teaspoons of all-purpose flour weighs 1.74 oz. This is based on all-purpose flour having a density of 125.16g 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 18.9 teaspoons.
Formula and Step-by-Step
- Start with 18.9 teaspoons of all-purpose flour
- 1 teaspoon of all-purpose flour = 2.61g
- 18.9 × 2.61 = 49.28g
- Convert grams to ounces: 49.28 ÷ 28.3495 = 1.74 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.
All-Purpose Flour at Different Amounts
How all-purpose flour scales across common teaspoons measurements. Your amount (18.9 teaspoons) is highlighted.
For reference, 18.9 teaspoons of all-purpose flour (49.28g) is close in weight to a large egg (no shell) (50g).
Other Amounts of All-Purpose Flour
| 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 | 0.09 oz | 0.11 oz |
| 1.5 teaspoons | 0.14 oz | 0.14 oz | 0.17 oz |
| 2 teaspoons | 0.18 oz | 0.19 oz | 0.22 oz |
| 3 teaspoons | 0.28 oz | 0.28 oz | 0.33 oz |
| 4 teaspoons | 0.37 oz | 0.37 oz | 0.44 oz |
| 5 teaspoons | 0.46 oz | 0.47 oz | 0.55 oz |
| 6 teaspoons | 0.55 oz | 0.56 oz | 0.66 oz |
| 8 teaspoons | 0.74 oz | 0.75 oz | 0.88 oz |
| 18.9 teaspoons | 1.74 oz | 1.76 oz | 2.09 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?
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.