ANSWER
1 US teaspoon of ground coffee = 0.19 oz
Do you mean volume or weight? If volume - 1 US teaspoon = 0.17 ounces US If weight - it depends of the density of your foodstuff. For example 1 US teaspoon of water = 0.17 oz 1 US teaspoon of...
1 US fluid ounce = 6 teaspoons. To convert a value in US fluid ounces to teaspoons, multiply by 6.
There are 2 tablespoons to an ounce, and 3 teaspoons to each tablespoon, so there are 6 teaspoons in a fluid ounce.
3 tsp1 oz = 6 tsp1 tsp = 0.16 oz