BMI Calculator

Global Body Mass Index Calculator

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Global Body Mass Index Calculator

Child BMI calculator is only valid for children between 2 and 20 years.


Body Mass Index (BMI) is a key for determining your healthy weight. BMI is also used in determining whether you are a candidate for bariatric weight loss surgery, either lap band or gastric bypass. Typically, to qualify for bariatric surgery you must be “morbidly obese” with a BMI over 40. However, some patients with an overweight BMI of 35 or more, combined with obesity related health issues, such as type 2 diabetes or heart disease, also qualify.

Of course, the BMI calculator is only a guide. Please consult with Dr. Weiner to find out if you qualify for weight loss surgery.
Classification BMI #
Underweight Below 18.5
Normal BMI 18.5 – 25
Overweight 26 – 29
Mild Obesity 30 – 34
Moderate Obesity 35 – 40
Morbid Obesity 40 – 50
Super Obesity 50+