Volume conversion
Milliliter to US teaspoon converter
Convert mL to tsp instantly, choose the displayed precision, and verify the result with the formula and reference table below.
US teaspoon (tsp)
Rounded for display only; calculations retain full precision.
Rounding and precision rules
- Convr calculates first and rounds the displayed result only once, at the final step.
- The default is a maximum of 6 decimal places; trailing zeros are removed.
- Very small values that would appear as zero, and values of 10¹² or more, use scientific notation.
- Display precision is not measurement uncertainty. For scientific, engineering, or regulated work, retain only the digits justified by the source measurement.
Practical context
Understanding this conversion
Milliliters give a precise metric volume for small liquid quantities. US teaspoons are familiar in American recipes, supplement labels, and serving instructions.
The result can differ slightly from the common 5 mL kitchen convention. For medical dosing, use the supplied measuring device and professional instructions rather than a household spoon.
Reviewed August 16, 2026.
Calculation
Milliliter to US teaspoon formula
tsp = mL × 0.202884
Calculations retain full precision and the result is rounded only for display.
Worked example
For 10 mL, the result is 2.028841 tsp. Substitute 10 mL into the formula to obtain 2.028841 tsp.
A numerical value expressed in us teaspoon is usually smaller than the same measurement expressed in milliliter, because 1 mL equals 0.202884 tsp.
Milliliter to US teaspoon reference table
Common values rounded to a maximum of 6 decimal places.
| Milliliter (mL) | US teaspoon (tsp) |
|---|---|
| 1 mL | 0.202884 tsp |
| 5 mL | 1.014421 tsp |
| 10 mL | 2.028841 tsp |
| 50 mL | 10.144207 tsp |
| 100 mL | 20.288414 tsp |
Understanding the units
About Milliliter and US teaspoon
Milliliter (mL)
One milliliter (mL) equals 0.001 L, the base relationship used for this volume conversion.
US teaspoon (tsp)
One us teaspoon (tsp) equals 0.004928922 L, the base relationship used for this volume conversion.
When this conversion is useful
Milliliter to US teaspoon conversion is useful for recipes, beverage quantities, fuel volumes, laboratory measurements, and container capacities. It lets you compare the same volume or capacity across documents, tools, or standards that use different units.
Learn with Convr
Conversion guides
Metric vs Imperial Units: A Practical Comparison
Understand how metric, US customary, and Imperial units differ, where each system is used, and how to convert between them reliably.
Read guide →Everyday conversionsUS Gallons vs Imperial Gallons: What Is the Difference?
Compare US liquid gallons and Imperial gallons, understand their exact liter values, and avoid common fuel and recipe conversion errors.
Read guide →Answers at a glance
Frequently asked questions
Is 5 mL one US teaspoon?
Five milliliters is approximately 1.01442 US teaspoons; it is commonly treated as one teaspoon for kitchen convenience.
Which teaspoon does this converter use?
It uses the standardized US customary teaspoon of exactly 4.92892159375 milliliters.
How does Convr round Milliliter to US teaspoon results?
Convr keeps full numeric precision during the calculation and rounds only the displayed result. The default is a maximum of 6 decimal places, with selectable precision on this page.
Can I convert negative or decimal milliliter values?
Yes. The converter accepts positive, negative, decimal, and scientific-notation values. Negative values are physically meaningful for some scales, such as temperature, but not for every measured quantity.
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