Milliliters to Teaspoons Converter
1 milliliter is about 0.202884 US teaspoons. To convert milliliters to teaspoons, divide by 4.92892159375.
Sources: NIST SP 811, NIST Handbook 44, BIPM SI Brochure Updated
Result
5 mL = 1.01442 tsp
How to convert milliliters to teaspoons
teaspoons = milliliters ÷ 4.92892159375
1 milliliter is one thousandth of a liter (1 cubic centimeter). 1 US teaspoon is 1/3 tablespoon (1/6 US fluid ounce).
Dividing by 4.92892159375 is exact. Written as a multiplication the factor is a repeating decimal, 1 mL = 0.2028841362111… tsp, so a rounded multiplier such as 0.2029 is slightly off. This converter keeps the exact fraction (32000000/157725491) and rounds only the result it shows.
Worked example: 15 mL
- Start with the value in milliliters: 15 mL.
- Divide by 4.92892159375, because 1 teaspoon = 4.92892159375 milliliters: 15 ÷ 4.92892159375 = 3.043262043….
- Round to the precision you need: 3.04 tsp to two decimals.
Milliliters and teaspoons side by side
Milliliters to teaspoons chart
Milliliters from 1 to 50 converted to teaspoons with the exact factor, shown to five significant digits.
| mL | tsp |
|---|---|
| 1 | 0.20288 |
| 2 | 0.40577 |
| 3 | 0.60865 |
| 4 | 0.81154 |
| 5 | 1.0144 |
| 6 | 1.2173 |
| 7 | 1.4202 |
| 8 | 1.6231 |
| 9 | 1.826 |
| 10 | 2.0288 |
| 11 | 2.2317 |
| 12 | 2.4346 |
| 13 | 2.6375 |
| 14 | 2.8404 |
| 15 | 3.0433 |
| 16 | 3.2461 |
| 17 | 3.449 |
| 18 | 3.6519 |
| 19 | 3.8548 |
| 20 | 4.0577 |
| 21 | 4.2606 |
| 22 | 4.4635 |
| 23 | 4.6663 |
| 24 | 4.8692 |
| 25 | 5.0721 |
| mL | tsp |
|---|---|
| 26 | 5.275 |
| 27 | 5.4779 |
| 28 | 5.6808 |
| 29 | 5.8836 |
| 30 | 6.0865 |
| 31 | 6.2894 |
| 32 | 6.4923 |
| 33 | 6.6952 |
| 34 | 6.8981 |
| 35 | 7.1009 |
| 36 | 7.3038 |
| 37 | 7.5067 |
| 38 | 7.7096 |
| 39 | 7.9125 |
| 40 | 8.1154 |
| 41 | 8.3182 |
| 42 | 8.5211 |
| 43 | 8.724 |
| 44 | 8.9269 |
| 45 | 9.1298 |
| 46 | 9.3327 |
| 47 | 9.5356 |
| 48 | 9.7384 |
| 49 | 9.9413 |
| 50 | 10.144 |
teaspoons = milliliters ÷ 4.92892159375. Factors: NIST SP 811, NIST Handbook 44, BIPM SI Brochure. unitcheck.net/cooking/milliliters-to-teaspoons/
Which cup, tablespoon and teaspoon?
All kitchen measures on this page are US customary: 1 cup is 8 US fluid ounces (236.5882365 mL), 1 tablespoon is half a fluid ounce (14.78676 mL) and 1 teaspoon is a third of a tablespoon (4.928922 mL). Cups and spoons sold in other countries can hold a different amount, so for a recipe written outside the United States check which measure the author means.
Going the other way? Use the Teaspoons to Milliliters converter.
Frequently asked questions
How many teaspoons are in 1 milliliter?
1 milliliter is about 0.202884 US teaspoons. 1 US teaspoon is 1/3 tablespoon (1/6 US fluid ounce).
How do I convert milliliters to teaspoons?
Divide by 4.92892159375: teaspoons = milliliters ÷ 4.92892159375. For example, 15 mL = 3.04 tsp.
How many milliliters are in 1 teaspoon?
1 US teaspoon is exactly 4.92892159375 milliliters. To go the other way, use the teaspoons to milliliters converter.
Is the mL to tsp conversion exact?
The relationship is exact (1 tsp = 4.92892159375 mL), but 1 ÷ 4.92892159375 is a repeating decimal, 0.2028841362…. The converter works with the exact fraction and rounds only the displayed result, so it does not pick up the small error a rounded multiplier would cause.
Sources
- NIST Special Publication 811, Guide for the Use of the International System of Units, Appendix B.8: Factors for Units Listed Alphabetically — exact factors are printed in bold in the NIST table (checked October 12, 2026)
- NIST Handbook 44 (2026), Appendix C: General Tables of Units of Measurement — US customary units and their exact relationships (checked October 12, 2026)
- BIPM, The International System of Units (SI Brochure), 9th edition — defines the SI units, the prefixes and the units accepted for use with the SI