This BMI Calculator will help you to calculate and evaluate your Body Mass Index (BMI) based on the relevant information on body weight, height, age and sex. You can easily find your ideal weight within a few seconds, categorize whether you are underweight, normal weight, overweight, or obese depending on what range the value falls between. This app is an imperfect measure of healthy body weight, it is a useful indicator of whether any additional testing or action is required.