Convert tablespoons to teaspoons
Enter a value in tablespoons to convert it to teaspoons.
tablespoons to teaspoons reference
| tablespoons | teaspoons |
|---|---|
| 1 tbsp | 3 tsp |
| 2 tbsp | 6 tsp |
| 5 tbsp | 15 tsp |
| 10 tbsp | 30.0001 tsp |
| 25 tbsp | 75.0002 tsp |
| 50 tbsp | 150.0004 tsp |
| 100 tbsp | 300.0008 tsp |
The conversion factor
One tablespoon is 3.00000812 teaspoons. So to convert, multiply your figure in tablespoons by 3.00000812. To go the other way, multiply teaspoons by 0.33333243, or use the teaspoons to tablespoons converter.
Doing it in your head
For a quick estimate, round the factor: roughly "times 3". Use the exact converter above when the number matters.
Where this conversion comes up
Cooking and baking (especially US vs metric recipes), fuel, and container sizes.
See the common unit conversions cheat sheet for the factors worth memorising.
Related tools
Frequently asked questions
How many teaspoons are in a tablespoon?
1 tablespoon = 3.000008 teaspoons.
What is the formula to convert tablespoons to teaspoons?
Multiply the number of tablespoons by 3.00000812. To go back the other way, multiply teaspoons by 0.33333243.
What is 10 tablespoons in teaspoons?
10 tablespoons = 30.0001 teaspoons. The reference table below lists more common values.
Is this converter accurate?
It uses the internationally defined conversion factors and computes at full floating-point precision, then rounds only the displayed result. For everyday purposes it is exact; for legal, engineering or scientific work, confirm the required number of significant figures.
Does it work offline?
Yes. The conversion runs in your browser with no server call, so it keeps working with no connection, and nothing you enter is uploaded.
Last reviewed: September 2026. Figures and formulas are checked against their published sources; see the site's data notes.