Teaspoons to Milliliters
Convert Teaspoons to Milliliters instantly.
How to Convert Teaspoons to Milliliters
To convert US teaspoons to milliliters, multiply by 4.92892. One US teaspoon equals 4.92892 milliliters — universally rounded to 5 ml in medicine and most cooking contexts. The teaspoon is the smallest standard US volume measurement, equal to ⅓ tablespoon or 1/6 fluid ounce. In medicine, the 5 ml teaspoon equivalent is the basis for standard liquid dose measurements, and medical professionals universally prefer ml over teaspoons for precision.
Teaspoons to Milliliters Reference Chart
Common conversions: ¼ tsp = 1.23 ml · ½ tsp = 2.46 ml · ¾ tsp = 3.70 ml · 1 tsp = 4.93 ml · 1½ tsp = 7.39 ml · 2 tsp = 9.86 ml · 3 tsp (1 tbsp) = 14.79 ml.
Frequently Asked Questions
How many ml are in a teaspoon?
One US teaspoon equals 4.92892 milliliters, universally rounded to 5 ml in medical and cooking contexts. This rounding (less than 1.5% off) is acceptable for virtually all practical purposes and makes the conversion simple to remember.
How many teaspoons is 15 ml?
15 ml ÷ 4.92892 = 3.04 teaspoons — essentially 3 teaspoons, which equals 1 tablespoon. The 5 ml = 1 teaspoon approximation makes this arithmetic straightforward: 15 ml = 3 tsp = 1 tbsp.
Why do doctors prefer ml over teaspoons for medicine?
Kitchen teaspoons vary significantly in actual volume — a flatware teaspoon might hold anywhere from 2.5 ml to 7 ml depending on its shape and how full it is. This variability can cause dangerous dosing errors, especially with medications for children. Medical measuring spoons and syringes calibrated in ml provide accurate, consistent doses. The FDA and AAP (American Academy of Pediatrics) recommend using ml-marked oral syringes for all liquid children's medications.
How many teaspoons are in a tablespoon?
There are exactly 3 teaspoons in 1 tablespoon. Key kitchen equivalences: 1 tsp = 5 ml, 1 tbsp = 3 tsp = 15 ml, ¼ cup = 4 tbsp = 12 tsp = 60 ml. These round-number approximations (using 5 ml per tsp and 15 ml per tbsp) simplify kitchen conversions significantly.