Teaspoons to Milliliters

1 tsp = 4.928922 mL

Teaspoons appear in recipes for salt, spices, baking soda, and vanilla, and also in medicine directions. Converting teaspoons to milliliters is useful when a dosing syringe, dropper, or metric spoon is the only accurate tool available, or when writing recipes for metric readers.

From

When you need to convert teaspoons to milliliters

Measuring vanilla or other extracts with a metric spoon
Translating medicine directions written in teaspoons to an oral syringe in mL
Writing recipes for readers who use metric measuring spoons
Logging small liquid amounts in a nutrition app

How to convert teaspoons to milliliters

mL = tsp × 4.928922

Example: 5 tsp = 24.64461 mL

Typical teaspoon amounts

Teaspoons (tsp)	Milliliters (mL)
0.25 tsp	1.23223 mL
0.5 tsp	2.464461 mL
1 tsp	4.928922 mL
1.5 tsp	7.393382 mL
2 tsp	9.857843 mL
3 tsp	14.78676 mL
4 tsp	19.71569 mL
5 tsp	24.64461 mL

Tips for converting teaspoons to milliliters

One US teaspoon is about 4.93 mL, and 5 mL is a standard approximation within about 1.5%.
Household cutlery teaspoons vary widely in size, so use a proper measuring spoon or syringe for medicine.
Abbreviations are easy to confuse: tsp is teaspoon, tbsp or T is tablespoon, which is three times larger.

Teaspoons to Milliliters conversion table

Teaspoons (tsp)	Milliliters (mL)
1 tsp	4.928922 mL
2 tsp	9.857843 mL
3 tsp	14.78676 mL
4 tsp	19.71569 mL
5 tsp	24.64461 mL
6 tsp	29.57353 mL
7 tsp	34.50245 mL
8 tsp	39.43137 mL
9 tsp	44.36029 mL
10 tsp	49.28922 mL
15 tsp	73.93382 mL
20 tsp	98.57843 mL
25 tsp	123.223 mL
30 tsp	147.8676 mL
40 tsp	197.1569 mL
50 tsp	246.4461 mL
75 tsp	369.6691 mL
100 tsp	492.8922 mL
250 tsp	1,232.23 mL
500 tsp	2,464.461 mL
1,000 tsp	4,928.922 mL

About the units

Teaspoons: The US teaspoon equals 1/3 of a tablespoon, about 4.93 milliliters.

Milliliters: The milliliter is a metric unit of volume, equal to one cubic centimeter.

Frequently asked questions

How many milliliters are in 1 teaspoon?

1 teaspoon equals 4.928922 milliliters.

How many teaspoons are in 1 milliliter?

1 milliliter equals 0.2028841 teaspoons.

How do I convert teaspoons to milliliters?

Use the formula mL = tsp × 4.928922.

What is 10 teaspoons in milliliters?

10 teaspoons equals 49.28922 milliliters.

Related conversions

Sources

Conversion factors use the exact definitions published by NIST and the BIPM, and are checked by automated tests against those definitions.

Last updated: October 17, 2026