A US teaspoon is one third of a US tablespoon.
Teaspoons to Tablespoons Converter — tsp to tbsp
Convert Teaspoon (tsp) to Tablespoon (tbsp) using the exact conversion factor (1 teaspoon = 0.3333333333 tablespoon). See the formula, worked examples, conversion table, unit comparison, and common uses.
Teaspoons to Tablespoons converter
Converter
Cooking Converter
Convert cooking volume and mass units used in recipes and nutrition workflows.
Context values
Some unit families need one extra value for a physically accurate result.
A US tablespoon is half a US fluid ounce.
Result = input x 4.92892159e-6 / 1.47867648e-5.
Volume units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Teaspoons to Tablespoons
Teaspoon and Tablespoon both show up in recipes, and converting between them matters whenever a recipe from one country's cookbook needs to be followed with another country's measuring tools. Teaspoon is most often used for us recipe and cooking measurement for small quantities.
Formula
tablespoons = teaspoons × 0.333333333333
This factor comes from each unit's defined relationship to the category's base unit: 1 teaspoon equals 0.00000492892159375 base units, and 1 tablespoon equals 0.0000147867647813 base units, so dividing one by the other gives the direct teaspoon-to-tablespoon factor of 0.333333333333.
Simple example
1 tsp × 0.3333333333 = 0.3333333333 tbsp
1 teaspoon = 0.3333333333 tablespoons.
Real-world example
2 tsp × 0.3333333333 = 0.6666666667 tbsp
2 teaspoons = 0.6666666667 tablespoons.
Conversion table
| Teaspoon (tsp) | Tablespoon (tbsp) |
|---|---|
| 0.25 tsp | 0.0833333333 tbsp |
| 0.5 tsp | 0.1666666667 tbsp |
| 1 tsp | 0.3333333333 tbsp |
| 2 tsp | 0.6666666667 tbsp |
| 4 tsp | 1.333333333 tbsp |
| 8 tsp | 2.666666667 tbsp |
Reverse conversion: Tablespoon to Teaspoon
0.3333333333 tbsp × 3 = 0.9999999999 tsp
0.3333333333 tablespoons = 0.9999999999 teaspoons.
teaspoons = tablespoons × 3
For a page dedicated to this direction, see Tablespoon to Teaspoon.
Teaspoon vs. Tablespoon
| Aspect | Teaspoon | Tablespoon |
|---|---|---|
| Family | US customary unit | US customary unit |
| Typical use | US recipe and cooking measurement for small quantities | US recipe and cooking measurement |
| Where it's used | United States (cooking and recipe measurement) | United States (cooking and recipe measurement) |
Understanding the Teaspoon
Teaspoon (tsp) measures volume. The US teaspoon is exactly 4.92892159375 milliliters — 1/3 of a US tablespoon and 1/48 of a US cup. It is classified as a US customary unit.
Where it's used: United States (cooking and recipe measurement)
Uses of the Teaspoon today
- US recipe and cooking measurement for small quantities
- Medication dosing instructions in the US
- Baking measurement alongside the tablespoon and cup
Understanding the Tablespoon
Tablespoon (tbsp) measures volume. The US tablespoon is exactly 14.78676478125 milliliters — 3 US teaspoons, or 1/16 of a US cup. It is classified as a US customary unit.
Where it's used: United States (cooking and recipe measurement)
Uses of the Tablespoon today
- US recipe and cooking measurement
- Nutrition labeling serving sizes in the US
- Medication dosing instructions in the US
Teaspoon — sources
- NIST Handbook 44, Appendix C — General tables of units including the US teaspoon definition.
Tablespoon — sources
- NIST Handbook 44, Appendix C — General tables of units including the US tablespoon definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many tablespoons are in 1 teaspoon?
1 teaspoon equals 0.3333333333 tablespoons, using the exact defined conversion factor rather than an estimate.
How do I convert teaspoon to tablespoon?
Multiply the teaspoon value by 0.3333333333. The converter above does this instantly to whatever precision you set.
How do I convert tablespoon back to teaspoon?
Use the reverse factor: 1 tablespoon equals 3 teaspoons. You can also use the swap control in the converter above to flip the direction instantly.
What is a teaspoon?
Teaspoon (tsp) measures volume. The US teaspoon is exactly 4.92892159375 milliliters — 1/3 of a US tablespoon and 1/48 of a US cup. It is classified as a US customary unit.
What is a tablespoon?
Tablespoon (tbsp) measures volume. The US tablespoon is exactly 14.78676478125 milliliters — 3 US teaspoons, or 1/16 of a US cup. It is classified as a US customary unit.
Is the teaspoon to tablespoon conversion exact?
Yes. The US tablespoon is exactly 14.78676478125 milliliters — 3 US teaspoons, or 1/16 of a US cup. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the teaspoon still used today?
United States (cooking and recipe measurement)