Discover easy to use and free BMI Calculator App and Weight Tracker. The Body Mass Index (BMI) is calculated with the standard formula used by WHO (World Health Organization). Please note that age and gender DO NOT affect BMI calculation. What is BMI? Body mass index, or BMI, is used to determine whether you are in an ideal weight range for your height. Accurate BMI Calculator - check your ideal weight. It gives you an idea of whether you're "underweight", a "healthy weight", "overweight", or "obese" for your height. BMI is a tool that helps health professionals assess the risk for chronic disease. BMI is a valuable measurement for most people over years. It is an estimate and should be considered as a rough guide only as it does not consider age, gender, ethnicity, or body composition. For nearly years now, medical professionals worldwide have used the universally accepted Body Mass Index (BMI) to help assess the overall state of a person's health. Experts have identified a flaw in the basic BMI formula. They have recently come up with a new calculation that presents a more realistic result as it scales more accurately concerning a person's height. BMI of < . A BMI of less than . indicates that you are underweight, so you may need to put on some weight. You are recommended to ask your doctor or a dietitian for advice. BMI of .. A BMI of .. indicates that you are at a healthy weight for your height. By maintaining a healthy weight, you lower your risk of developing serious health problems. BMI of . A BMI of . indicates that you are slightly overweight. You may be advised to lose some weight for health reasons. You are recommended to talk to your doctor or a dietitian for advice. A BMI of over indicates that you are heavily overweight. Your health may be at risk if you do not lose weight. You are recommended to talk to your doctor or a dietitian for advice. More information about Body Mass Index classification, which our BMI Calculator and Weight Tracker App uses, is available on the World Health Organization (WHO) website. Now it's time to calculate your Body Mass Index. Get the free BMI Calculator App and learn more about your ideal weight range for your height.