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ml to tsp Converter

Convert milliliters and US teaspoons in either direction using 1 US teaspoon = 4.92892159375 mL. No rounded spoon convention is substituted.

Content updated October 7, 2026 · Details

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Converted volume

Inputs ↓
US teaspoons
3.043 US tsp
US teaspoon factor
4.92892159375 mL per tsp

15.00 ml equals 3.043 US tsp.

US teaspoon: 1 tsp = 4.92892159375 mL.

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Worked example

conversionType: mlToTsp · amount: 15

Result: 3.043 US tsp

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US teaspoons are a defined volume

This tool uses 1 US teaspoon = 4.92892159375 mL. It is not an assumption that every teaspoon equals 5 mL. Fifteen mL gives 3.043 US teaspoons at the tool’s displayed precision; 2 US teaspoons give 9.86 mL. Rounding occurs after applying the conversion factor.

For larger liquid amounts, use mL to US fluid ounces or US fluid ounces to mL. Measuring an ingredient by weight instead needs its density, as in the milligrams to tablespoons converter.

This calculator converts nonnegative liquid volumes between milliliters and US teaspoons. It uses 1 US teaspoon = 4.92892159375 mL. It does not substitute a rounded spoon convention.

Formula

US tsp=mL4.92892159375\text{US tsp}=\frac{\text{mL}}{4.92892159375}

mL=US tsp×4.92892159375\text{mL}=\text{US tsp}\times4.92892159375

For 15 mL, the unrounded result is 3.0432620431658695 US teaspoons and the display is 3.043 US tsp.

Related: the teaspoons to milliliters converter for the reverse direction, plus the ml to tbsp converter and tbsp to ml converter.

Convert the total before rounding to spoonfuls

Keep fractional teaspoons through the conversion and decide the measuring-device increments afterward. Rounding to a convenient spoonful changes the requirement; it is a practical adjustment separate from the unit arithmetic.

Frequently asked questions

How do I convert mL to US teaspoons?

Divide mL by 4.92892159375. The reverse direction multiplies US teaspoons by the same factor.

Sources

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