There are three teaspoons in a tablespoon. That means that there are 1.5 teaspoons in a 1/2 tablespoon, and 1/3 of a tablespoon is a single teaspoon.
Each tablespoon contains three teaspoons. This makes it easy for cooks and bakers to substitute measurements if their tablespoon measure is broken or missing. Each teaspoon should be leveled off, making sure that whatever being measured reaches the top of the spoon but doesn't exceed the amount of a single tablespoon. In general, there are two tablespoons to the ounce. Similarly, there are 16 tablespoons in one cup, which equates to 48 teaspoons, and two cups to the pint.