BMI Calculator is a great tool to determine when extra pounds translate into health risks. BMI is a measure which takes into account a person's weight and height to gauge total body fat in adults.
This calculator will calculate your BMR (Basal Metabolic Rate). Your BMR, is the energy (measured in calories) expended by the body at rest to maintain normal bodily functions. If your are going for a diet to lose weight then you can start here.