A metric tablespoon is 15 milliliters.
Metric tablespoons to Teaspoons Converter — metric tbsp to tsp
Convert Metric tablespoon (metric tbsp) to Teaspoon (tsp) using the exact conversion factor (1 metric tablespoon = 3.043262043 teaspoon). See the formula, worked examples, conversion table, and common uses.
Metric tablespoons to Teaspoons converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
A US teaspoon is one third of a US tablespoon.
Result = input x 1.5e-5 / 4.92892159e-6.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Metric tablespoons to Teaspoons
Metric tablespoon and Teaspoon appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Specifically: A metric tablespoon is 15 milliliters, and a US teaspoon is one third of a US tablespoon.
Formula
teaspoons = metric tablespoons × 3.04326204317
This factor comes from each unit's defined relationship to the category's base unit: 1 metric tablespoon equals 0.000015 base units, and 1 teaspoon equals 0.00000492892159375 base units, so dividing one by the other gives the direct metric tablespoon-to-teaspoon factor of 3.04326204317.
Simple example
1 metric tbsp × 3.043262043 = 3.043262043 tsp
1 metric tablespoon = 3.043262043 teaspoons.
Real-world example
10 metric tbsp × 3.043262043 = 30.43262043 tsp
10 metric tablespoons = 30.43262043 teaspoons.
Conversion table
| Metric tablespoon (metric tbsp) | Teaspoon (tsp) |
|---|---|
| 1 metric tbsp | 3.043262043 tsp |
| 5 metric tbsp | 15.21631022 tsp |
| 10 metric tbsp | 30.43262043 tsp |
| 25 metric tbsp | 76.08155108 tsp |
| 50 metric tbsp | 152.1631022 tsp |
| 100 metric tbsp | 304.3262043 tsp |
Reverse conversion: Teaspoon to Metric tablespoon
3.043262043 tsp × 0.3285947729 = 0.9999999999 metric tbsp
3.043262043 teaspoons = 0.9999999999 metric tablespoons.
metric tablespoons = teaspoons × 0.328594772917
For a page dedicated to this direction, see Teaspoon to Metric tablespoon.
Understanding the Metric tablespoon (metric tbsp)
A metric tablespoon is 15 milliliters.
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
Teaspoon — sources
- NIST Handbook 44, Appendix C — General tables of units including the US teaspoon definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many teaspoons are in 1 metric tablespoon?
1 metric tablespoon equals 3.043262043 teaspoons, using the exact defined conversion factor rather than an estimate.
How do I convert metric tablespoon to teaspoon?
Multiply the metric tablespoon value by 3.043262043. The converter above does this instantly to whatever precision you set.
How do I convert teaspoon back to metric tablespoon?
Use the reverse factor: 1 teaspoon equals 0.3285947729 metric tablespoons. You can also use the swap control in the converter above to flip the direction instantly.
What is a metric tablespoon?
Metric tablespoon (metric tbsp) is a unit of volume.
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.
Is the metric tablespoon to teaspoon conversion exact?
Yes. The US teaspoon is exactly 4.92892159375 milliliters — 1/3 of a US tablespoon and 1/48 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.