Text Size: A- A+ Facebook Twitter LinkedIn YouTube

Related Classes & Events

Bariatric Surgery

Getting Started

Is weight-loss surgery right for you?

To be a candidate for weight-loss surgery, patients should meet all of the criteria established by the National Institutes of Health.

One of the key criteria is your body mass index (BMI). Your BMI is used to determine whether you have severe (also called "morbid") obesity.  Use the "BMI Calculator" and "Gauge Your Results" on this page to determine your BMI and your severity of obesity.

  • Individuals with a BMI of 40 or more may qualify for bariatric surgery.
  • If your BMI is 35 or more, and you have an obesity-related health problem (type 2 diabetes, sleep apnea, high blood pressure), then you may also be a candidate for bariatric surgery.

Your Body Mass Index (BMI)

Your BMI is calculated from your body weight and your height.   Use the equations below to calculate your BMI, depending on whether your weight and height are in metric units (kilograms and meters) or in pounds and inches:

Calculation of BMI using kilograms and meters:
1)    weight in kg   ÷   height in m2    =    Body Mass Index (BMI)

Calculation of BMI using pounds and inches:
2)    weight (lbs)   x   703   ÷   height in inches2   =    Body Mass Index (BMI)

BMI Calculator and Gauge for Severity of Obesity

Instead of the formulas above, you can use our "BMI Calculator" that follows to calculate your BMI.

Then use the "Gauge Your Results" chart to determine whether this BMI qualifies as obesity.


BMI Calculator
Height (in feet):
Weight (in pounds):
Your BMI is:
Gauge Your Results
BMI Range
Under 19 Underweight
Between 19 and 24 Ideal
Between 25 and 29 Overweight
Between 30 and 39 Obese
Between 40 and 49 Morbid Obesity
Over 50 Super-Morbid Obesity
West Penn Allegheny Health System
Tell us who you are:

What areas do you use on our website?*
(select more than one if it applies)

Did you find what you were looking for?

Would you refer others to our website?

Can we contact you for future questions?

CAPTCHA math question:* 7 + 4 =

Thank you for completing the West Penn Allegheny Health System website survey.
We value your feedback and comments.