How many ml are in 1 teaspoon?

1 US teaspoon equals exactly 4.92892 milliliters (often rounded to 5 ml for rough cooking purposes). This converter uses the precise value of 4.92892 ml for accurate results.

Is 1 teaspoon equal to 5 ml?

Approximately, yes. The exact value is 4.92892 ml, which is close enough to 5 ml for most kitchen uses, but the difference matters when precision is required — such as in pharmaceutical or scientific measurements.

How many teaspoons are in a tablespoon?

1 tablespoon equals exactly 3 US teaspoons, which is 14.787 ml (3 × 4.92892 ml).

How many ml is half a teaspoon?

Half a teaspoon (0.5 tsp) equals 2.464 ml.

How do I convert ml back to teaspoons?

Divide the number of milliliters by 4.92892. For example, 10 ml ÷ 4.92892 = 2.029 tsp. Use the reverse converter on this page to do it instantly.

Does this converter use US teaspoons or metric teaspoons?

This converter uses the US customary teaspoon (4.92892 ml). The metric teaspoon used in Australia and some other countries is exactly 5 ml. For most US recipes, use this converter.

Teaspoons to Milliliters Converter

Name: Teaspoons to Milliliters Converter
Availability: InStock
Author: Nham Vu

Convert US teaspoons to milliliters (or ml to tsp) instantly. 1 tsp = 4.92892 ml. Includes a cooking equivalents reference table.

Two-Way Converter

Teaspoons (tsp)

Result — Milliliters (ml)

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Reverse

Milliliters (ml)

Result — Teaspoons (tsp)

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Conversion factor: 1 US tsp = 4.92892 ml | Results shown to 3 decimal places

Cooking Equivalents

Common measurements — US customary to metric

Measurement	tsp	ml

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Summary

Convert US teaspoons to milliliters (or ml to tsp) instantly. 1 tsp = 4.92892 ml. Includes a cooking equivalents reference table.

How it works

Enter the number of teaspoons in the top input field.
The equivalent milliliter value appears instantly below.
To convert in reverse, enter milliliters in the lower input field.
Results are shown to 3 decimal places for precision.
Use the reference table to look up common cooking measurements at a glance.

Use cases

Scale a recipe from US teaspoons to metric milliliters.
Measure liquid medicine doses accurately when only a teaspoon measure is available.
Convert cooking instructions from American cookbooks into metric equivalents.
Check extract or flavoring amounts (vanilla, almond, etc.) in precise ml.
Help baristas and mixologists convert small-volume recipes.
Convert infant medication doses listed in tsp to ml for accurate syringe use.

Frequently Asked Questions

Last updated: 2026-06-09 · Reviewed by Nham Vu