A recipe calls for 2 tsp of vanilla extract. How many milliliters is that?

2 tsp is 9.8578431875 mL, about 9.86 mL. Multiply 2 by 4.92892159375.

My measuring spoon holds 5 mL. How far off is a US teaspoon?

A US teaspoon is 4.92892159375 mL, so a 5 mL spoon holds 0.07107840625 mL more, about 1.4%. Over 6 spoons the gap is about 0.43 mL.

A recipe asks for 12 tsp. How many milliliters is that?

12 tsp is 59.147059125 mL, about 59.15 mL. That equals 4 US tablespoons.

What is 1 US teaspoon in milliliters, exactly?

1 tsp is 4.92892159375 mL. It is one third of the US tablespoon, 14.78676478125 mL.

US Teaspoons to Milliliters Converter

Enter a value to instantly convert between volume units.

From

Precision4 dp

1 US Teaspoon = 4.9289 Milliliter

Key Formulas

Liter → US Gallon

gal = L × 0.264172

US Gallon → Liter

L = gal × 3.78541

US Cup → Milliliter

mL = cup × 236.588

Milliliter → US Cup

cup = mL × 0.00422675

Formula

mL = tsp × 4.92892159375

US recipes list teaspoons for spices, extracts and leavening, while measuring jugs and recipe apps use milliliters. Multiply US teaspoons by 4.92892159375 to get milliliters. This page uses the US customary teaspoon, 4.92892159375 mL exactly, and counts 3 tsp as 1 tbsp. A 5 mL teaspoon is about 1.4% larger. Do not use kitchen spoons to measure medicine. Use the dosing device supplied with the medicine. See also teaspoons to tablespoons.

Source: NIST SP 811, Appendix B

Reviewed by the Convert Calc editorial team · Last reviewed: 2026-10-22 · see our methodology

Frequently Asked Questions

Real-World Examples

Example: 1/2 tsp of salt in a batter.

0.5 tsp = 2.464460796875 mL

Example: 1 tsp of vanilla extract in a cake.

1 tsp = 4.92892159375 mL

Example: 3 tsp, which is 1 US tablespoon.

3 tsp = 14.78676478125 mL

Example: 6 tsp, which is 1 US fluid ounce.

6 tsp = 29.5735295625 mL

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See This in Context

Cooking