What is the average weight of a 17-year-old?

* This depends on your height and build. Speak to a doctor if you have concerns as everyone is slightly different. * There is no 'average' weight for a 17-year-old boy because weight is related to height and body composition. For in-depth information about weight in relation to height, and to see the distribution of weights and heights of children and teenagers at various ages, please see the page link, further down this page, listed under "Related Questions."