1 ounce is equal to 6 teaspoons since 3 teaspoons form 1 tablespoon and 2 tablespoons make 1 fluid ounce. Since dry ounces and liquid ounces measure weight and volume, respectively, it is important to distinguish between them in this situation.
A teaspoon cannot be transformed directly into dry ounces, which measure weight, because it is a unit of volume. Depending on the density of the component, confusion between the two units can lead to significantly differing amounts of substances being added to recipes.
Additionally, the definition of fluid ounces varies slightly between the United States and Great Britain. In the United States, 1 fluid ounce of water weighs a little bit more than a dry ounce, however in Great Britain, it weighs exactly 1 dry ounce.