US tablespoons to US teaspoons
1 US tablespoon = 3 US teaspoons · 1 tsp (US) = 0.33333 tbsp (US)
1 US tablespoon = 3 US teaspoons
How it’s calculated
tsp (US) = tbsp (US) × 3
- Multiply the value in US tablespoons by 3.
- To go back, divide by 3 (or multiply by 0.3333333333).
- 1 tbsp (US) = 3 tsp (US) · 1 tsp (US) = 0.3333333333 tbsp (US)
Show worked solutionFactor, unit cancellation and rounding, step by step
Find the conversion factor
By definition 1 tbsp (US) = 0.00001478676478125 m³ and 1 tsp (US) = 0.00000492892159375 m³, so 1 tbsp (US) = 3 tsp (US). Source: NIST SP 811 / Handbook 44.
Multiply by the factor written as a fraction
Put tbsp (US) in the denominator so it cancels, leaving tsp (US).
Calculate (unrounded)
Round the answer
Rounded to 5 significant figures.
Answer: 3 tsp (US)
1 tbsp (US) in other units
Batch convert tbsp (US) → tsp (US)
- 1 tbsp (US) = 3 tsp (US)
- 5 tbsp (US) = 15 tsp (US)
- 10 tbsp (US) = 30 tsp (US)
- 25 tbsp (US) = 75 tsp (US)
Quick examples
- 1 US tablespoon = 3 US teaspoons
- 5 US tablespoons = 15 US teaspoons
- 10 US tablespoons = 30 US teaspoons
- 25 US tablespoons = 75 US teaspoons
- 100 US tablespoons = 300 US teaspoons
About these units
US tablespoon (tbsp (US))
US customary
1/2 US fl oz = 14.786 764 781 25 mL.
1 tbsp (US) = 0.00001478676478 m³
Source: NIST SP 811 / Handbook 44
US teaspoon (tsp (US))
US customary
1/3 US tablespoon = 4.928 921 593 75 mL.
1 tsp (US) = 0.000004928921594 m³
Source: NIST SP 811 / Handbook 44
US tablespoons to US teaspoons conversion table
| US tablespoons (tbsp (US)) | US teaspoons (tsp (US)) |
|---|---|
| 0.125 tbsp (US) | 0.375 tsp (US) |
| 0.25 tbsp (US) | 0.75 tsp (US) |
| 0.3333333333 tbsp (US) | 1 tsp (US) |
| 0.5 tbsp (US) | 1.5 tsp (US) |
| 0.6666666667 tbsp (US) | 2 tsp (US) |
| 0.75 tbsp (US) | 2.25 tsp (US) |
| 1 tbsp (US) | 3 tsp (US) |
| 1.5 tbsp (US) | 4.5 tsp (US) |
| 2 tbsp (US) | 6 tsp (US) |
| 3 tbsp (US) | 9 tsp (US) |
| 4 tbsp (US) | 12 tsp (US) |
| 5 tbsp (US) | 15 tsp (US) |
| 6 tbsp (US) | 18 tsp (US) |
| 8 tbsp (US) | 24 tsp (US) |
Related conversions
Frequently asked questions
How do I convert US tablespoons to US teaspoons?
Use tsp (US) = tbsp (US) × 3. Multiply the value in US tablespoons by 3.
How many US teaspoons are in 1 US tablespoon?
1 US tablespoon (tbsp (US)) equals 3 US teaspoons (tsp (US)).
How many US tablespoons are in 1 US teaspoon?
1 US teaspoon (tsp (US)) equals 0.33333 US tablespoons (tbsp (US)); more precisely 0.3333333333.
What is 10 tbsp (US) in tsp (US)?
10 US tablespoons = 30 US teaspoons.
Is the US tablespoon a US or a UK unit?
This converter uses the US customary US tablespoon. 1/2 US fl oz = 14.786 764 781 25 mL. US and UK units with the same name can differ, so check which one your source uses.
Is the US teaspoon a US or a UK unit?
This converter uses the US customary US teaspoon. 1/3 US tablespoon = 4.928 921 593 75 mL. US and UK units with the same name can differ, so check which one your source uses.
What is a US tablespoon?
1/2 US fl oz = 14.786 764 781 25 mL.
Formula: tsp (US) = tbsp (US) × 3. Factors last reviewed 2026-10-27.