how many fluid ounces are in a tablespoon
(tsp to fl oz) and fluid ounces to teaspoons. 1 US teaspoon (tsp) = 1/6 or 0.166666667 US fluid ounce (fl. oz.) = 4.92892159 milliliters (ml) = 1/3 US tablespoons (tbsp). The teaspoon is rounded to precisely 5 mL (0.169070114 US fluid ounces) by US federal regulations for food labeling purposes.