If your 173 pound s and 5'3 and 12 how much are you over weight?

173 pounds is probably overweight for a 12-year-old. However, we would need more details in order to answer your question because weight is related to height and body composition rather than age. For more information about weight in relation to height, and to see the distribution of weights and heights of children at various stages, please see the page link, further down this page, listed under Related Questions. Alternatively, please feel free to ask the question again and include more detail.