How many teaspoon of garlic powder equals 3 tablespoons minced garlic?

A teaspoon is thought to be the equivalent of 1 clove of garlic. With that in mind, 4 teaspoons would be equal 4 cloves of garlic. That said, garlic cloves most certainly vary in size so be mindful of this when making your conversion, and note that this ratio is not an exact science!