Since 3 teaspoons make 1 tablespoon and 2 tablespoons make 1 fluid ounce, 1 ounce is equal to 6 teaspoons. In this case, you need to be careful to tell the difference between weight and volume measurements, since dry ounces measure weight and liquid ounces measure volume.
Since a teaspoon is a measure of volume, it can’t be changed directly into dry ounces, which are a measure of weight. If you mix up these two units, the amount of an ingredient you add to a recipe can be very different depending on how dense the ingredient is. The United States and Great Britain also have slightly different ideas about what a fluid ounce is. In Great Britain, 1 dry ounce of water weighs exactly 1 fluid ounce. In the United States, 1 fluid ounce of water weighs a little more than 1 dry ounce.