20ml is equivalent to 4.058UStsp.
Milliliters is a metric unit of volume equal to one thousandth of a liter
US tsp = mL * 0.20288
Use this Milliliters to Teaspoons (mL to tsp) conversion calculator for Volume conversions with additional tables and formulas at Metric-conversions.org.
Tip! Americans typically measure ingredients by volume, while just about everyone else measures them by weight. Here is a quick summary of some of the basic cooking conversions shared by Startcooking.com.