21 Cup (US) to Teaspoon (US)
Quick answer
21 Cup (US) (cup) equals
1,008 tsp
To convert 21 Cup (US)s to Teaspoon (US)s, multiply by 48. Therefore, 21 Cup (US) (cup) equals 1,008 Teaspoon (US) (tsp).
Formula: tsp = cup × 48. Calculation: 21 × 48 = 1,008 tsp.
Convert Cup (US) (cup) to Teaspoon (US) (tsp) online with our free unit converter. In volume, 1 cup = 48 tsp. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Cup (US) to Teaspoon (US)
- Step 1 — start with the formula. tsp = cup × 48
- Step 2 — substitute your figure. 21 cup × 48
- Step 3 — read the result. 21 cup = 1,008 tsp
- Step 4 — check it in reverse. cup = tsp × 0.0208333333 returns Invalid cup, which matches the figure you started with.
Volume Converter
40 units available
21 cup = 1,008 tsp
Formula:
tsp = cup × 48With your value: 21 cup = 1,008 tsp
How big is that?
Everyday references on a logarithmic scale, all expressed in cup (us) so you can sanity-check the result.
Other Cup (US) to Teaspoon (US) conversions
Cup (US) to Teaspoon (US) Conversion Table
| Cup (US) (cup) | Teaspoon (US) (tsp) |
|---|---|
| 0.5 | 24 |
| 1 | 48 |
| 2 | 96 |
| 5 | 240 |
| 10 | 480 |
| 15 | 720 |
| 20 | 960 |
| 25 | 1,200 |
| 50 | 2,400 |
| 100 | 4,800 |
| 250 | 12,000 |
| 500 | 24,000 |
| 1000 | 48,000 |
Teaspoon (US) to Cup (US) Conversion Table
| Teaspoon (US) (tsp) | Cup (US) (cup) |
|---|---|
| 0.5 | 0.010417 |
| 1 | 0.020833 |
| 2 | 0.041667 |
| 5 | 0.104167 |
| 10 | 0.208333 |
| 15 | 0.3125 |
| 20 | 0.416667 |
| 25 | 0.520833 |
| 50 | 1.041667 |
| 100 | 2.083333 |
| 250 | 5.208333 |
| 500 | 10.416667 |
| 1000 | 20.833333 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Cup (US) (cup)
Volume
Derived from the cubic metre. The litre is exactly 10⁻³ m³; US and imperial capacity units are exact multiples fixed by statute.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
Teaspoon (US) (tsp)
Volume
Derived from the cubic metre. The litre is exactly 10⁻³ m³; US and imperial capacity units are exact multiples fixed by statute.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Cup (US) to Teaspoon (US)
To convert from Cup (US) (cup) to Teaspoon (US) (tsp), multiply the value by 48.
Formula: tsp = cup × 48
Reverse: cup = tsp × 0.0208333333
Step-by-Step Example
- Start with your value in Cup (US). For example: 5 cup
- Multiply by the conversion factor: 5 x 48
- The result is: 240 tsp
Cup (US) and Teaspoon (US) Relationship
Both Cup (US) and Teaspoon (US) belong to the US Customary / Imperial system, making this an intra-system conversion within volume. Since 1 Cup (US) equals approximately 48 Teaspoon (US)s, the Cup (US) represents a larger unit interval than the Teaspoon (US). Understanding the relationship between Cup (US) and Teaspoon (US) is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Cup (US)
The US cup equals approximately 236.6 mL and is a standard cooking measurement in the United States.
Common uses of Cup (US): baking, cooking, recipes.
About Teaspoon (US)
The US teaspoon equals approximately 4.93 mL. It is one of the most common cooking measurements.
Common uses of Teaspoon (US): cooking, medicine dosage, baking.
Frequently Asked Questions
- What is 21 Cup (US) in Teaspoon (US)?
- 21 Cup (US) equals 1,008 Teaspoon (US).
- How many Teaspoon (US)s are in 1 Cup (US)?
- There are exactly 48 Teaspoon (US)s in 1 Cup (US). This means the conversion factor from Cup (US) to Teaspoon (US) is 48.
- What is the formula to convert Cup (US) to Teaspoon (US)?
- The formula to convert Cup (US) to Teaspoon (US) is: tsp = cup × 48. For example, to convert 10 Cup (US)s to Teaspoon (US)s, you would multiply 10 by 48.
- What is a Cup (US)?
- The US cup equals approximately 236.6 mL and is a standard cooking measurement in the United States.
- What is a Teaspoon (US)?
- The US teaspoon equals approximately 4.93 mL. It is one of the most common cooking measurements.
- What are the common uses of Cup (US)?
- The Cup (US) is commonly used in baking, cooking, recipes.
Related Volume Conversions
Cite this page
UnitConvertLab. (2026). 21 Cup (US) to Teaspoon (US). UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/21-cup_us-to-teaspoon_us