Milliliters to Teaspoons Converter (mL to tsp)

Metric recipes, flavoring bottles and dosing syringes give small liquid amounts in milliliters, while an American spoon set is marked in teaspoons. Since a US teaspoon is 4.92892159375 mL, each milliliter is about a fifth of a teaspoon, and the first chart runs in small steps from half a milliliter to 50 mL. Extract bottles show the link in reverse: a bottle labeled 59 mL is the US 2 fl oz size, which holds exactly 12 US teaspoons.

Many metric spoon sets hold 5 mL per teaspoon and 15 mL per tablespoon, and British sets often add a 10 mL dessert spoon. A recipe step such as "10 mL vanilla" therefore means about 2 US teaspoons, close enough for cooking. For medicine, keep the milliliter dose and use the syringe that came with it rather than converting.

How to use this tool

1. Type a value in the Milliliter box to see it in teaspoons, or type in the Teaspoon box to convert the other way.
2. Press ⇄ to swap the two units, or Load example for a typical value.
3. Check the charts below for common values; for other units, open the Volume converter.

Formula

Teaspoon (tsp) = Milliliter (mL) × 0.202884136211

Milliliter (mL) = Teaspoon (tsp) × 4.92892159375

Both factors come from exact definitions: 1 teaspoon = 4.92892159375 milliliters and 1 milliliter = 0.202884136211 teaspoons (shown to 12 significant digits).

Example

Two conversions worked with the same factors the converter uses:

2.5 mL × 0.202884136211 ≈ 0.50721 tsp

1.5 tsp × 4.92892159375 ≈ 7.39338 mL

Milliliter to Teaspoon chart

Common values from milliliters to teaspoons, rounded to four decimal places.

Teaspoon to Milliliter chart

The reverse direction for values people often look up.

Small metric measures in teaspoons

Quick mental estimate

Divide by 5, which is the same as doubling and moving the decimal point one place left: 12.5 mL → 25 → 2.5 tsp. The real answer is 2.54 tsp, so this runs about 1.4% low.

Use the converter or the charts when the exact figure matters.

The two units

Milliliter (mL): A milliliter is one thousandth of a liter and exactly the same volume as one cubic centimeter. There are 1,000 microliters in a milliliter and 1,000 milliliters in a liter.

Teaspoon (tsp): The US customary teaspoon used here is one third of a US tablespoon, or 1/6 of a US fluid ounce: exactly 4.92892159375 mL. A metric teaspoon is 5 mL and uses a different convention.