Teaspoons (US) to Milliliters Converter
Convert teaspoons (us) to milliliters instantly. Exact factor: 1 tsp = 4.929 mL.
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Convert teaspoons (us) to milliliters
The exact conversion factor is 1 tsp = 4.929 mL. Type any value and the result updates instantly; the math is shown beneath the board.
Worked by hand
Multiply the teaspoons (us) value by 4.929 to get milliliters.
Worked example
- Take 1 tsp
- multiply by 4.929
- the result is 4.929 mL
How to use it
- Enter your teaspoons (us)
- Read the milliliters result
- Check the factor line to verify by hand
Frequently asked questions
How many milliliters are in one teaspoons (us)?
Exactly 4.929 mL, by the SI/NIST definition.
How do I convert milliliters back to teaspoons (us)?
Divide by 4.929 — or use the full converter where both directions are one click.
Is this rounding or exact?
The factor is exact; only the displayed decimals are rounded.