A metric teaspoon is 5 milliliters.
Metric teaspoons to Teaspoons Converter — metric tsp to tsp
Convert Metric teaspoon (metric tsp) to Teaspoon (tsp) using the exact conversion factor (1 metric teaspoon = 1.014420681 teaspoon). See the formula, worked examples, conversion table, and common uses.
Metric teaspoons to Teaspoons converter
Converter
Cooking Converter
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 one third of a US tablespoon.
Result = input x 5e-6 / 4.92892159e-6.
Volume units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Metric teaspoons to Teaspoons
Metric teaspoon and Teaspoon both show up in recipes, and converting between them matters whenever a recipe from one country's cookbook needs to be followed with another country's measuring tools. Specifically: A metric teaspoon is 5 milliliters, and a US teaspoon is one third of a US tablespoon.
Formula
teaspoons = metric teaspoons × 1.01442068106
This factor comes from each unit's defined relationship to the category's base unit: 1 metric teaspoon equals 0.000005 base units, and 1 teaspoon equals 0.00000492892159375 base units, so dividing one by the other gives the direct metric teaspoon-to-teaspoon factor of 1.01442068106.
Simple example
1 metric tsp × 1.014420681 = 1.014420681 tsp
1 metric teaspoon = 1.014420681 teaspoons.
Real-world example
2 metric tsp × 1.014420681 = 2.028841362 tsp
2 metric teaspoons = 2.028841362 teaspoons.
Conversion table
| Metric teaspoon (metric tsp) | Teaspoon (tsp) |
|---|---|
| 0.25 metric tsp | 0.2536051703 tsp |
| 0.5 metric tsp | 0.5072103405 tsp |
| 1 metric tsp | 1.014420681 tsp |
| 2 metric tsp | 2.028841362 tsp |
| 4 metric tsp | 4.057682724 tsp |
| 8 metric tsp | 8.115365448 tsp |
Reverse conversion: Teaspoon to Metric teaspoon
1.014420681 tsp × 0.9857843187 = 0.9999999999 metric tsp
1.014420681 teaspoons = 0.9999999999 metric teaspoons.
metric teaspoons = teaspoons × 0.98578431875
For a page dedicated to this direction, see Teaspoon to Metric teaspoon.
Understanding the Metric teaspoon (metric tsp)
A metric teaspoon is 5 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 teaspoon?
1 metric teaspoon equals 1.014420681 teaspoons, using the exact defined conversion factor rather than an estimate.
How do I convert metric teaspoon to teaspoon?
Multiply the metric teaspoon value by 1.014420681. The converter above does this instantly to whatever precision you set.
How do I convert teaspoon back to metric teaspoon?
Use the reverse factor: 1 teaspoon equals 0.9857843187 metric teaspoons. You can also use the swap control in the converter above to flip the direction instantly.
What is a metric teaspoon?
Metric teaspoon (metric tsp) is a unit of cooking.
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 teaspoon 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.