🧪 Volume Converter

Teaspoons to Milliliters
( tsp → mL )

Instantly convert US teaspoons to milliliters. Enter any value below and get an accurate result with the full formula and reference table.

Converter Tool
tsp
mL
Result
1 tsp ≈ 4.929 mL
4.929
mL
The Formula
mL = tsp × 4.92892
1 US teaspoon = 4.92892159375 mL (exactly). For everyday use, 4.92892 is sufficiently accurate.

How to Convert Teaspoons to Milliliters

To convert US teaspoons to milliliters, multiply the number of teaspoons by 4.92892. This is the standard conversion factor based on the definition of a teaspoon.

Step-by-Step Example

Let’s convert 2 teaspoons to milliliters:

1. Multiply by 4.92892: 2 × 4.92892 = 9.85784
2. So 2 tsp equals approximately 9.86 mL.

For a smaller amount, 0.5 tsp × 4.92892 = 2.46446 mL.

When You’d Use Each Unit

Teaspoons are commonly used in cooking and baking in the US for small quantities of ingredients. Milliliters are the standard metric unit for volume and are used worldwide in recipes, medicine, and science. Converting between them is essential for following recipes from different countries and for precise measurements.

Conversion Table

Common teaspoons values converted to milliliters — typical values highlighted.

Teaspoons (tsp) Milliliters (mL) Approximate
Frequently Asked Questions
How do I convert teaspoons to milliliters quickly? +
Multiply by 5 for a rough estimate (since 1 tsp ≈ 5 mL). For exact conversion, multiply by 4.92892. This tool provides the precise value.
How many milliliters are in a teaspoon? +
There are approximately 4.92892 milliliters in one US teaspoon.
What is 1 tsp in mL? +
1 tsp ≈ 4.92892 mL.
What is 1 mL in teaspoons? +
1 mL ≈ 0.202884 tsp.
Is this the same as a UK teaspoon? +
No, UK teaspoons are about 5.91939 mL. This converter uses the US teaspoon (4.92892 mL), which is the most common in recipes and nutrition labeling.
Can I convert milliliters back to teaspoons with this tool? +
Yes! Just type a value into the milliliters field and the teaspoons field updates automatically. Or use the ⇄ swap button to switch directions.
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