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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.
1 US cup = 48 US teaspoons. A teaspoon is one-sixth of a fluid ounce. In other words, there are six teaspoons in one ounce, and there are eight ounces in a cup. 6 times 8 equals 48. 1 cup = 48 teaspoons. 1 teaspoon = 0.02 cup.