Body Mass, Body Fat Percentage, Ideal Weight, Health Risk, Caloric Needs, Fat Needs, Protein Needs, Carbo Needs, Heart Rate, etc.
http://www.self.com/calculators/
This site has several useful interactive features, such as a "Personal Nutritionist" that can help you to assess what you need to change in your diet.
http://www.ama-assn.org/consumer/interact.htm