Tsp to mL Converter
This tsp to mL converter changes US teaspoons into milliliters as you type. One teaspoon is about 4.93 mL, so the tool multiplies your value and shows the result right away, with a conversion table and the formula for cooking and dosing.
Last updated July 9, 2026 1 tsp = 4.93 mL Reviewed by the Calcowa team
Teaspoons to Milliliters conversion table
Common teaspoons values converted to milliliters, so you can read the answer straight off the chart.
| Teaspoons (tsp) | Milliliters (mL) |
|---|---|
| 0.25 tsp | 1.23 mL |
| 0.5 tsp | 2.46 mL |
| 0.75 tsp | 3.7 mL |
| 1 tsp | 4.93 mL |
| 1.5 tsp | 7.39 mL |
| 2 tsp | 9.86 mL |
| 3 tsp | 14.79 mL |
| 4 tsp | 19.72 mL |
| 5 tsp | 24.64 mL |
| 6 tsp | 29.57 mL |
These are US teaspoons of about 4.93 mL, often rounded to 5 mL. A metric teaspoon is exactly 5 mL.
How to convert teaspoons to milliliters
To convert teaspoons to milliliters, multiply by the conversion factor. One tsp equals 4.93 mL, so you just scale your number up or down from there.
Frequently asked questions
One US teaspoon is about 4.93 mL, usually rounded to 5 mL. A metric teaspoon, and most medicine spoons, are exactly 5 mL.
About 1.01 US teaspoons, so 5 mL is essentially one teaspoon. That's why medicine doses are often given as 5 mL.
Multiply the teaspoons by 4.9289 to get milliliters. For example, 2 tsp times 4.9289 is about 9.86 mL.
There are 3 teaspoons in one tablespoon, so one tablespoon is about 14.79 mL.
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