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Body Mass Index (BMI)

Body Mass Index (BMI) is measure of body fat based on height and weight that applies to both adult men and women. BMI does not differentiate between body fat and muscle mass. Therefore, body builders and people who have a lot of muscle bulk will have a high BMI but are not overweight or obese.

BMI Calculator

BMI Calculator

Height (ft)

Weight (lbs)

Your Body Mass Index

BMI Result

  • BMI
  • What your BMI result indicates
  • Less than 19
  • UNDERWEIGHT: You are under optimum weight for your height. You could afford to gain a little weight.

  • 20 - 25
  • ACCEPTABLE: You have a healthy weight for your height.

  • 26 - 30
  • OVERWEIGHT: You are over optimum weight for your height. You may be facing health problems, so losing some weight would be a good idea.

  • 31 +
  • OBESE: You are over optimum weight for your height. You may be facing health risks, so see your doctor to help you achieve a healthier weight.

Fat predominantly distributed around the waist is also a risk factor for health complications such as cardiovascular disease and type II diabetes. Fat predominantly deposited around the hips and buttocks doesn't have this same risk.

Bariatric or weight loss surgery is recommended if you have:

  • A BMI of 35 or greater with comorbid condition(s) such as diabetes or cardiovascular disease
  • A BMI of 40 or greater
  • American College of Surgeons
  • American Society for Metabolic & Bariatric Surgery
  • American Medical Association
  • Case Western Reserve University
  • Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program