Your BMI is just one piece of the puzzle. It’s based on height and weight but doesn’t take into account your muscle mass, bone density, or body composition. Your healthcare provider will consider whether your BMI is too high or too low for you. Use the interactive BMI chart and table to check your BMI against the World Health Organization's official classifications. Find out if your BMI is underweight, normal, overweight or obese based on your height and weight. Discover healthy BMI ranges by age for teens, adults, and seniors. Understand how ideal BMI shifts over time and differs between genders, plus view easy charts. What is body mass index (BMI)? Body mass index (BMI) is a medical screening tool that measures the ratio of your height to your weight to estimate the amount of body fat you have. Healthcare providers calculate BMI by using weight in kilograms (kg) divided by the square of height in meters (m2).
