Milliliters to Teaspoons Converter
Enter the volume in milliliters below to convert it to teaspoons.
Convert Milliliters to Teaspoons (US)
Enter a value in milliliters (mL) to convert to teaspoons (us) (tsp).
Milliliter to Teaspoon Conversion Table
Table showing various milliliter measurements converted to teaspoons. Click any preset value or arrow to load it into the converter.
| Milliliters (mL) | Teaspoons (US) (tsp) |
|---|---|
| 1 mL | 0.2028841 tsp |
| 2 mL | 0.4057683 tsp |
| 5 mL | 1.0144207 tsp |
| 7.5 mL | 1.521631 tsp |
| 10 mL | 2.0288414 tsp |
| 15 mL | 3.043262 tsp |
| 20 mL | 4.0576827 tsp |
| 25 mL | 5.0721034 tsp |
| 30 mL | 6.0865241 tsp |
| 50 mL | 10.1442068 tsp |
How to Convert Milliliters to Teaspoons
To convert milliliters to teaspoons, multiply the volume by the following conversion ratio: 0.2028841 teaspoons/milliliter.
Since one milliliter is equal to 0.2028841 teaspoons, you can use this simple formula to convert:
The volume in teaspoons is equal to the volume in milliliters multiplied by 0.2028841.
For example, here's how to convert 15 milliliters to teaspoons using the formula above.
How Many Teaspoons Are in a Milliliter?
There are 0.2028841 teaspoons in a milliliter, which is why we use this value in the formula above.
Our milliliter to teaspoon calculator automatically converts your volume measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Milliliters and teaspoons are both units used to measure volume. Keep reading to learn more about each unit.
What Is a Milliliter?
A milliliter is a unit of volume equal to 1/1,000 of a liter (0.001 L). One-thousandth of a liter, identical to 1 cubic centimeter (cc). [1]
The milliliter is classified as a metric and SI-compatible unit of volume. Milliliters can be abbreviated as mL; for example, 1 milliliter can be written as 1 mL.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the milliliter (mL) a convenient decimal multiple of the liter (L).
In practice, milliliters (mL) are widely used across fine-tolerance laboratory, analytical, and micro-scale volume measurements within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Teaspoon?
A teaspoon is a unit of volume equal to 0.0049289 liters (L), the base unit for volume. 1/3 of a US tablespoon (4.9289 mL). [2]
The teaspoon is classified as a US customary unit of volume. Teaspoons can be abbreviated as tsp; for example, 1 teaspoon can be written as 1 tsp.
When working with teaspoons (tsp) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, teaspoons (tsp) are widely used across fine-tolerance laboratory, analytical, and micro-scale volume measurements within US customary workflows, engineering documentation, and technical data sheets.
When converting volume between milliliters (mL) and teaspoons (tsp), keep full floating-point precision (1 mL = 0.2028841 tsp; 1 tsp = 4.9289216 mL) during intermediate calculations and round only the final teaspoon figure to match your instrument tolerance.
More Milliliter & Teaspoon Conversions
Need to calculate in the opposite direction? Use our teaspoons (us) to milliliters converter (tsp to mL) to switch your starting unit immediately. You can also explore related tools such as converting tablespoons (us) to teaspoons (us), converting milliliters to fluid ounces (us), or converting milliliters to cups (us).
Convert from Milliliters
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Volume)·Volume & Liquid Metrology Standard — Milliliters (mL) to Teaspoons (US) (tsp)
- [2]NIST HB 44 SpecificationNIST HB 44 (Liquid & Dry Capacity Tables)·Unit Specifications: Milliliter (mL) & Teaspoon (US) (tsp)
- [3]NIST SP 811 ReferenceNIST SP 811 (NIST SP 811 App. B.9)·Conversion Factors & Mathematical Basis (mL to tsp)