Obesity is classified by the percent over the ideal body weight.
The difference between the actual weight and the ideal weight is divided by the ideal weight, then times 100 to get the percent overweight. Using the above formula, you can determine your desirable body weight. The formula provides an approximate desirable body weight for height. The weight range can vary on an individual basis. The height, weight, and head circumference should be measured and plotted in relationship to age on a growth chart at each well child check from 2 weeks through 3 years of age.