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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.
How many teaspoons equal one-half tablespoon? 1 tsp = 5 mL 1 Tbs = 15 mL A half tablespoon would be about 1 1/2 tsp.aking the world better, one answer at a time. There are 3 teaspoons in one tablespoon, so half of a tablespoon equals 1 1/2 teaspoons.