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Now that we know how many fluid ounces and milliliters there are in a teaspoon and a tablespoon, we can count easily how many teaspoons in a tablespoon: 1  1 US tablespoon has 3 teaspoons. 2  1 Australian tablespoon has 4 teaspoons.
A teaspoon is an imperial unit of volume, while a milliliter is a metric unit of volume. One teaspoon is defined as 1/3 tablespoon. There are 16 tablespoons in 1 cup, so there are 48 teaspoons in 1 cup. One cup is equal to 237 milliliters. Dividing the number of milliliters in 1 cup by the number of teaspoons in 1 cup reveals the number of milliliters in a teaspoon: 237 / 48 = 4.93. Learn more about Food Measurements