1 Teaspoon to Milliliters

1 tsp ≈ 4.9289 mL

Calculation: mL = 1 tsp × 4.92892 ≈ 4.9289 mL

Teaspoon to Milliliter Converter

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How much is 1 tsp?

4.9 mL (0.17 fl oz) is about one metric teaspoon, a standard small medicine dose.

What does 1 tsp look like?

Illustration of a medicine dropper (teaspoon volume)
4.9 mL (0.17 fl oz) is about one metric teaspoon, a standard small medicine dose.

1 tsp on the milliliter scale

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1 tsp = 4.929 mL

Did you know? One teaspoon is 5 mL.

The metric teaspoon is exactly 5 mL. The US customary teaspoon is 4.93 mL — close enough for cooking.

How to Convert Teaspoon to Milliliter

1 Teaspoon = 4.92892 milliliters

Milliliter = Teaspoon × 4.92892

Example: 1 tsp × 4.92892 = 4.9289 mL

Reverse Conversion

To convert milliliters back to Teaspoons:

  • Remember, 1 milliliter equals 0.202884 Teaspoons.
  • To convert 4.9289 mL to tsp, multiply 4.9289 x 0.202884, resulting in 1 tsp.

1 tsp is also equal to:

Frequently Asked Questions

How much is 1 Teaspoon in milliliters?

1 Teaspoon equals 4.9289 milliliters. This is calculated by multiplying 1 by the conversion factor 4.92892.

What does 1 Teaspoon look like in milliliters?

1 Teaspoon (4.9289 milliliters) is one to three teaspoons — a tablespoon worth.

How do you calculate 1 Teaspoon to milliliters?

Multiply 1 by the conversion factor 4.92892. The calculation is 1 × 4.92892 = 4.9289 milliliters. This factor is defined by international measurement standards.

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1 Teaspoon = 4.92892 milliliters
1 Teaspoon = 4.92892 milliliters — conversion chart

Nearby Conversions

0.125 Teaspoons0.6161 milliliters 0.25 Teaspoons1.232 milliliters 0.5 Teaspoons2.464 milliliters 0.75 Teaspoons3.697 milliliters 1.25 Teaspoons6.161 milliliters 1.5 Teaspoons7.393 milliliters 2 Teaspoons9.858 milliliters 2.5 Teaspoons12.32 milliliters

For general conversions between Teaspoons and milliliters, see the Teaspoons to milliliters converter.

Also convert Teaspoons to:

Conversion factors verified against NIST, BIPM, ISO 80000-3 1 US gallon = 3.785411784 L (exact, US customary). Last reviewed: March 2026
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.