Milliliters to US Teaspoons
Convert milliliters to us teaspoons instantly. 1 mL = 0.2028841362 tsp. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert milliliters to us teaspoons
To convert milliliters to us teaspoons, divide by 4.9289215937 (multiply by 0.2028841362). The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
tsp = mL × 0.2028841362
Milliliters to US Teaspoons conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Milliliters | US Teaspoons |
|---|---|
| 1 mL | 0.202884 tsp |
| 2 mL | 0.405768 tsp |
| 3 mL | 0.608652 tsp |
| 5 mL | 1.014421 tsp |
| 10 mL | 2.028841 tsp |
| 20 mL | 4.057683 tsp |
| 25 mL | 5.072103 tsp |
| 50 mL | 10.144207 tsp |
| 100 mL | 20.288414 tsp |
| 500 mL | 101.442068 tsp |
| 1,000 mL | 202.884136 tsp |
What is a milliliter?
A thousandth of a litre, equal to one cubic centimetre.
What is a us teaspoon?
About 4.93 mL. The smallest standard US kitchen measure.
The formula
tsp = mL × 0.2028841362
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Milliliters to US Teaspoons
- Type the number of milliliters you want to convert.
- Read the result in us teaspoons straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked us teaspoons to milliliters page.
Milliliters to US Teaspoons — frequently asked questions
How many us teaspoons are in a milliliter?
One milliliter equals 0.2028841362 tsp. tsp = mL × 0.2028841362
What is the formula to convert milliliters to us teaspoons?
The formula is tsp = mL × 0.2028841362. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert us teaspoons back to milliliters?
Divide instead of multiplying: one us teaspoon is 4.9289215937 mL. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this milliliters to us teaspoons free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error