Milliliter to Teaspoon Converter
Instantly convert milliliter teaspoon with our free converter. See conversion tables, formulas, and step-by-step explanations.
Reviewed by Manoj Kumar, Mathematics Educator
Formula
Teaspoons = Milliliters / 4.929 (US) or mL / 5 (metric)
Divide milliliters by the teaspoon size: 4.929 mL for US, 5 mL for metric, or 5.919 mL for imperial. The metric standard of 5 mL per teaspoon is used most widely.
Worked Examples
Example 1: Cough Medicine Dosage
Problem:A cough syrup says take 10 mL per dose. How many teaspoons is that?
Solution:Teaspoons = 10 mL / 4.929 mL/tsp = 2.029 US teaspoons\nUsing metric: 10 / 5 = 2.0 metric teaspoons\nTablespoons = 10 / 14.787 = 0.68 tbsp
Result:10 mL = 2 teaspoons (metric standard)
Example 2: Baking Recipe Conversion
Problem:A European recipe calls for 2.5 mL of vanilla extract. How many teaspoons?
Solution:US teaspoons = 2.5 / 4.929 = 0.507 tsp\nMetric teaspoons = 2.5 / 5 = 0.5 tsp\nThis is half a teaspoon.
Result:2.5 mL = 0.5 teaspoons (half a teaspoon)
Frequently Asked Questions
How many milliliters are in a teaspoon?
A US teaspoon equals approximately 4.929 mL, a metric teaspoon equals exactly 5 mL, and an imperial teaspoon equals about 5.919 mL. The metric teaspoon is the simplest to work with since it is exactly 5 milliliters. In cooking, the differences are usually negligible, but in medicine and science, precision matters. Most medication dosing cups and syringes use the 5 mL standard.
Is a teaspoon 5 mL or 4.93 mL?
Both values are correct depending on the standard used. The metric teaspoon is defined as exactly 5 mL and is the most commonly used standard worldwide. The US customary teaspoon is legally defined as approximately 4.92892 mL. For cooking, the difference is negligible. For medication dosing, pharmaceutical companies standardize on 5 mL per teaspoon. Always use a proper measuring device rather than a household spoon, which can vary from 2.5 to 7.3 mL.
References
Reviewed by Manoj Kumar, Mathematics Educator · Editorial policy