Teaspoons to Milliliters Converter
Formula
mL = tsp × 4.929
One US teaspoon equals 4.929 milliliters (approximately 5 mL).
How to use
- Enter the number of teaspoons in the Teaspoons field.
- The converter multiplies by 4.92892 automatically.
- Read the equivalent volume in milliliters.
Example
Enter 5 in Teaspoons and the result is 5 × 4.92892 = 24.6 mL. That is about 25 mL, roughly the volume of a small medicine dose.
Frequently Asked Questions
How many mL in 1 teaspoon?
1 US teaspoon = 4.93 mL (≈ 5 mL).
How many mL is half a teaspoon?
Half a US teaspoon is about 2.46 mL, which most people round to 2.5 mL. This amount comes up often with liquid medicine dosing and small additions of vanilla extract or salt in baking. Using a proper measuring spoon matters here, since eyeballing such a small volume is easy to get wrong.
Is a metric teaspoon different from a US teaspoon?
Yes, a metric teaspoon is defined as exactly 5 mL, while a US teaspoon is 4.93 mL, so the metric version is very slightly larger. The difference is tiny and rarely matters in cooking, which is why recipes often treat one teaspoon as simply 5 mL. For medication, follow the unit your dosing instructions specify and use the provided measuring device.