What's considered to be overweight for a 14 year old boy?

Go to cdc site. Go to www.Cdc.Gov and toggle through the opening page down to the statistics section.After you bring up the statistics section you can go to growth charts. By placing the kids height an the 14y height chart you get their % size. Follow down to the weight chart along the 14y line to the same % weight.That is the expected weight. More than one growth % line above that point is considered excessive.