40 teaspoon makes how many cups?

This is because there are 3 teaspoons in 1 tablespoon, and 16 tablespoons in 1 cup. So, 40 teaspoons is equal to 40/3 = 13.33 tablespoons. And 13.33 tablespoons is equal to 13.33/16 = 0.83 cups. Rounded to the nearest third of a cup, this is 2/3 cup.