A US tablespoon is half a US fluid ounce.
Tablespoons to Metric teaspoons Converter — tbsp to metric tsp
Convert Tablespoon (tbsp) to Metric teaspoon (metric tsp) using the exact conversion factor (1 tablespoon = 2.957352956 metric teaspoon). See the formula, worked examples, conversion table, and common uses.
Tablespoons to Metric 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 metric teaspoon is 5 milliliters.
Result = input x 1.47867648e-5 / 5e-6.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Tablespoons to Metric teaspoons
Tablespoon and Metric 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. Tablespoon is most often used for us recipe and cooking measurement.
Formula
metric teaspoons = tablespoons × 2.95735295625
This factor comes from each unit's defined relationship to the category's base unit: 1 tablespoon equals 0.0000147867647813 base units, and 1 metric teaspoon equals 0.000005 base units, so dividing one by the other gives the direct tablespoon-to-metric teaspoon factor of 2.95735295625.
Simple example
1 tbsp × 2.957352956 = 2.957352956 metric tsp
1 tablespoon = 2.957352956 metric teaspoons.
Real-world example
10 tbsp × 2.957352956 = 29.57352956 metric tsp
10 tablespoons = 29.57352956 metric teaspoons.
Conversion table
| Tablespoon (tbsp) | Metric teaspoon (metric tsp) |
|---|---|
| 1 tbsp | 2.957352956 metric tsp |
| 5 tbsp | 14.78676478 metric tsp |
| 10 tbsp | 29.57352956 metric tsp |
| 25 tbsp | 73.93382391 metric tsp |
| 50 tbsp | 147.8676478 metric tsp |
| 100 tbsp | 295.7352956 metric tsp |
Reverse conversion: Metric teaspoon to Tablespoon
2.957352956 metric tsp × 0.338140227 = 0.9999999999 tbsp
2.957352956 metric teaspoons = 0.9999999999 tablespoons.
tablespoons = metric teaspoons × 0.338140227018
For a page dedicated to this direction, see Metric teaspoon to Tablespoon.
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
Understanding the Metric teaspoon (metric tsp)
A metric teaspoon is 5 milliliters.
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 metric teaspoons are in 1 tablespoon?
1 tablespoon equals 2.957352956 metric teaspoons, using the exact defined conversion factor rather than an estimate.
How do I convert tablespoon to metric teaspoon?
Multiply the tablespoon value by 2.957352956. The converter above does this instantly to whatever precision you set.
How do I convert metric teaspoon back to tablespoon?
Use the reverse factor: 1 metric teaspoon equals 0.338140227 tablespoons. You can also use the swap control in the converter above to flip the direction instantly.
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.
What is a metric teaspoon?
Metric teaspoon (metric tsp) is a unit of volume.
Is the tablespoon to metric teaspoon 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 tablespoon still used today?
United States (cooking and recipe measurement)