US tablespoons to US teaspoons
Type a value in US tablespoons and get the result in US teaspoons, calculated exactly.
1 US tablespoons = 3 US teaspoons
Precision
Exact factorThis result is exact.
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Formula
tsp (US) = tbsp (US) × 3
To convert US tablespoons to US teaspoons, multiply the value by 3.
Worked examples
- 1 tbsp (US) × 3 = 3 tsp (US)
- 100 tbsp (US) × 3 = 300 tsp (US)
- 50 tbsp (US) × 3 = 150 tsp (US)
This factor is exact by definition.
Conversion table
| US tablespoons (tbsp (US)) | US teaspoons (tsp (US)) |
|---|---|
| 0.25 | 0.75 |
| 0.5 | 1.5 |
| 0.75 | 2.25 |
| 1 | 3 |
| 1.5 | 4.5 |
| 2 | 6 |
| 2.5 | 7.5 |
| 3 | 9 |
| 4 | 12 |
| 5 | 15 |
| 6 | 18 |
| 8 | 24 |
| 10 | 30 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: US teaspoons to US tablespoons
| US teaspoons (tsp (US)) | US tablespoons (tbsp (US)) |
|---|---|
| 0.25 | ≈ 0.08333333 |
| 0.5 | ≈ 0.1666667 |
| 0.75 | 0.25 |
| 1 | ≈ 0.3333333 |
| 1.5 | 0.5 |
| 2 | ≈ 0.6666667 |
| 2.5 | ≈ 0.8333333 |
| 3 | 1 |
| 4 | ≈ 1.333333 |
| 5 | ≈ 1.666667 |
| 6 | 2 |
| 8 | ≈ 2.666667 |
| 10 | ≈ 3.333333 |
Unit definitions
- US tablespoons tbsp (US)
- Half a US fluid ounce: exactly 14.78676478125 mL.
- US teaspoons tsp (US)
- One third of a US tablespoon: exactly 4.92892159375 mL.
Questions people ask
US tablespoons to US teaspoons: what is the conversion factor?
One tbsp (US) is 3 tsp (US).
How do I convert US tablespoons to US teaspoons?
Use the formula above. For example, 100 tbsp (US) = 300 tsp (US).
Is the conversion exact?
Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.
Factors checked 19 October 2026.