Milliliter is 0.001 liter units.
Milliliters to Metric teaspoons Converter — mL to metric tsp
Convert Milliliter (mL) to Metric teaspoon (metric tsp) using the exact conversion factor (1 milliliter = 0.2 metric teaspoon). See the formula, worked examples, conversion table, history, and common uses.
Milliliters to Metric 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 metric teaspoon is 5 milliliters.
Result = input x 1e-6 / 5e-6.
Volume units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Milliliters to Metric teaspoons
Milliliter and Metric 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. Milliliter is most often used for medicine dosing (worldwide, including in the us).
Formula
metric teaspoons = milliliters × 0.2
This factor comes from each unit's defined relationship to the category's base unit: 1 milliliter equals 0.000001 base units, and 1 metric teaspoon equals 0.000005 base units, so dividing one by the other gives the direct milliliter-to-metric teaspoon factor of 0.2.
Simple example
1 mL × 0.2 = 0.2 metric tsp
1 milliliter = 0.2 metric teaspoons.
Real-world example
2 mL × 0.2 = 0.4 metric tsp
2 milliliters = 0.4 metric teaspoons.
Conversion table
| Milliliter (mL) | Metric teaspoon (metric tsp) |
|---|---|
| 0.25 mL | 0.05 metric tsp |
| 0.5 mL | 0.1 metric tsp |
| 1 mL | 0.2 metric tsp |
| 2 mL | 0.4 metric tsp |
| 4 mL | 0.8 metric tsp |
| 8 mL | 1.6 metric tsp |
Reverse conversion: Metric teaspoon to Milliliter
0.2 metric tsp × 5 = 1 mL
0.2 metric teaspoons = 1 milliliters.
milliliters = metric teaspoons × 5
For a page dedicated to this direction, see Metric teaspoon to Milliliter.
Understanding the Milliliter
Milliliter (mL) measures volume. A milliliter is one-thousandth of a liter, equal to one cubic centimeter. It is classified as a SI derived (metric prefix) unit.
Where it's used: Standard small-volume unit worldwide
Uses of the Milliliter today
- Medicine dosing (worldwide, including in the US)
- Cooking and recipe measurement outside the US
- Beverage and small-container labeling
History of the Milliliter
The milliliter follows directly from the liter via the 'milli-' SI prefix. It is notable as one of the few metric units in routine US use, since medicine dosing (syringes, liquid medication) is specified in milliliters even in the US.
Historical origin. Milliliter was not the invention of a single named person; it developed through the process described above.
Understanding the Metric teaspoon (metric tsp)
A metric teaspoon is 5 milliliters.
Milliliter — sources
- BIPM SI Brochure — SI prefixes — Defines 'milli-' as the prefix for 10⁻³.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many metric teaspoons are in 1 milliliter?
1 milliliter equals 0.2 metric teaspoons, using the exact defined conversion factor rather than an estimate.
How do I convert milliliter to metric teaspoon?
Multiply the milliliter value by 0.2. The converter above does this instantly to whatever precision you set.
How do I convert metric teaspoon back to milliliter?
Use the reverse factor: 1 metric teaspoon equals 5 milliliters. You can also use the swap control in the converter above to flip the direction instantly.
What is a milliliter?
Milliliter (mL) measures volume. A milliliter is one-thousandth of a liter, equal to one cubic centimeter. It is classified as a SI derived (metric prefix) unit.
What is a metric teaspoon?
Metric teaspoon (metric tsp) is a unit of cooking.
Is the milliliter to metric teaspoon conversion exact?
Yes. Both milliliter and metric teaspoon are defined by fixed standards rather than physical artifacts, so the factor of 0.2 used above is exact to as many digits as you choose to display.
Where is the milliliter still used today?
Standard small-volume unit worldwide