A US tablespoon equals 3 US teaspoons, or about 14.79 milliliters.
Tablespoon to Metric teaspoon
Convert Tablespoon to Metric 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 metric teaspoon is defined as exactly 5 milliliters.
metric tsp = tbsp × 2.957352956
Results update instantly for Tablespoon to Metric teaspoon conversions.
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Formula
metric tsp = tbsp × 2.957352956
tbsp = metric tsp × 0.338140227
Conversion table
| 1 tbsp | 2.957353 metric tsp |
| 5 tbsp | 14.786765 metric tsp |
| 10 tbsp | 29.57353 metric tsp |
| 20 tbsp | 59.147059 metric tsp |
| 50 tbsp | 147.867648 metric tsp |
| 100 tbsp | 295.735296 metric tsp |
| 500 tbsp | 1478.676478 metric tsp |
| 1000 tbsp | 2957.352956 metric 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 metric teaspoon (metric tsp). A metric teaspoon is defined as exactly 5 milliliters.
How do I convert tablespoon to metric teaspoon?
Multiply the tablespoon value by 2.957352956. For example, 10 tbsp × 2.957352956 = 29.57353 metric tsp.
Is the tablespoon to metric 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 metric teaspoon back to tablespoon?
Yes. Multiply the metric teaspoon value by 0.338140227 to get tablespoon.
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About this conversion
This page converts tablespoon (tbsp) to metric teaspoon (metric tsp) within the cooking converter.
A US tablespoon equals 3 US teaspoons, or about 14.79 milliliters. A metric teaspoon is defined as exactly 5 milliliters.
The formula is metric tsp = tbsp × 2.957352956, 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 metric teaspoon.