A US tablespoon equals 3 US teaspoons, or about 14.79 milliliters.
Tablespoon to Teaspoon
Convert Tablespoon to Teaspoon instantly. Free online cooking unit converter with exact formula, conversion table and FAQ.
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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 teaspoon is a customary volume unit equal to 4.92892159375 milliliters, commonly used in recipes.
tsp = tbsp × 3
Results update instantly for Tablespoon to Teaspoon conversions.
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Formula
tsp = tbsp × 3
tbsp = tsp × 0.3333333333
Conversion table
| 1 tbsp | 3 tsp |
| 5 tbsp | 15 tsp |
| 10 tbsp | 30 tsp |
| 20 tbsp | 60 tsp |
| 50 tbsp | 150 tsp |
| 100 tbsp | 300 tsp |
| 500 tbsp | 1500 tsp |
| 1000 tbsp | 3000 tsp |
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Frequently asked questions
What is the source unit in this conversion?
The source unit is the tablespoon (tbsp). A US tablespoon equals 3 US teaspoons, or about 14.79 milliliters.
What is the destination unit in this conversion?
The destination unit is the teaspoon (tsp). A US teaspoon is a customary volume unit equal to 4.92892159375 milliliters, commonly used in recipes.
How do I convert tablespoon to teaspoon?
Multiply the tablespoon value by 3. For example, 10 tbsp × 3 = 30 tsp.
Is the tablespoon to teaspoon conversion exact?
Yes. This conversion uses a fixed factor defined for cooking measurement standards, so results are consistent every time.
Where is this conversion commonly used?
It's used when following recipes, adjusting ingredient quantities, or converting between US customary and metric cooking measurements.
Can I convert teaspoon back to tablespoon?
Yes. Multiply the teaspoon value by 0.3333333333 to get tablespoon.
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About this conversion
This page converts tablespoon (tbsp) to teaspoon (tsp) within the cooking converter.
A US tablespoon equals 3 US teaspoons, or about 14.79 milliliters. A US teaspoon is a customary volume unit equal to 4.92892159375 milliliters, commonly used in recipes.
The formula is tsp = tbsp × 3, based on each unit's fixed relationship to the cooking converter's reference units.
Results are consistent because the conversion relies on a fixed numerical ratio rather than an estimate.
Use the calculator above for instant results, or the table below for common tablespoon values already converted to teaspoon.