There are chart and tables that are used to determine what one?s target weight should be. They vary according to gender, height, age, and bone structure. A simpler and more useful piece of information is Body Mass Index (BMI). The BMI is calculated by dividing your weight (in kilograms) by the square of one?s height (in meters). To fall within the ?healthy range? on the BMI, the result should be within 20 and 25. Results, both, lesser and greater than these values are associated with significant health risks. Adults can benefit from weight loss if they are moderately to severely overweight. Adults who are overweight and have weight-related medical problems or a family history of such problems can benefit from weight loss. Some weight-related health problems include diabetes, heart disease, high blood pressure, high cholesterol levels, or high blood sugar levels. Even a small weight loss of 10 to 20 pounds can improve one?s health. One does not need to lose weight if one?s weight is within the healthy range on the weight-for-height chart