US teaspoons to milliliters converter
Convert us teaspoons to milliliters with an editable calculator, worked example, formula and reference table. Check the unit definitions before you convert.
Updated · How we checkUse a decimal point, such as 2.5. Enter a value in US tsp; the result is in mL.
Formula
Worked example
Convert 10 US tsp to mL:
10 US tsp ≈ 49.28921594 mL
Multiply your US tsp value by the factor above. The calculator uses the full conversion factor before rounding the displayed answer.
US teaspoons to milliliters table
Reference values rounded to 10 significant digits. Use the converter above for other amounts.
| US teaspoons (US tsp) | Milliliters (mL) |
|---|---|
| 0.1 | ≈ 0.4928921594 |
| 0.5 | ≈ 2.464460797 |
| 1 | ≈ 4.928921594 |
| 2 | ≈ 9.857843188 |
| 5 | ≈ 24.64460797 |
| 10 | ≈ 49.28921594 |
| 25 | ≈ 123.2230398 |
| 50 | ≈ 246.4460797 |
| 100 | ≈ 492.8921594 |
| 1000 | ≈ 4,928.921594 |
Understanding us teaspoons
This tool uses a US customary teaspoon: 4.92892159375 mL. A metric recipe teaspoon of 5 mL is a different definition.
Understanding milliliters
A milliliter is one thousandth of a liter. This is a volume measurement, not a mass measurement.
Precision and rounding
The calculator keeps decimal precision during the conversion. Displayed values use up to 10 significant digits; an approximation sign marks the reference results. Keep extra digits until your final measurement or purchase decision.
References
Definitions and method references. Example rates and prices on this page are editable assumptions.