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BASS Bariatric Surgery Center BMI Calculator

Calculate your BMI (Body Mass Index)

In general, BMI is an easy-to-perform method of screening for weight category, for example underweight, normal or healthy weight, overweight, and obesity.

Are you a good candidate for weight-loss surgery?
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What is Body Mass Index (BMI)?

BMI is a mathematical calculation used to measure a person’s percentage of body fat. The formula for BMI is a person’s weight in pounds divided by the square of their height in inches. With the help of a calculator you can quickly get your BMI. In general, BMI is an easy-to-perform method of screening for weight category, for example underweight, normal or healthy weight, overweight, and obesity.

Health Risks of Obesity

According to the Centers for Disease Control and Prevention (CDC),more than one-third of U.S. adults (34.9%or 78.6 million)are obese.

There are various medical conditions that are associated with obesity, such as:

•    Heart Disease

•    Diabetes

•    Hypertension

•    Osteoarthritis

•    Liver Disease

•    Sleep Apnea

•    Depression

•    Acid Reflux

•    BMI Ranges

A high BMI can be an indicator of high body fatness. BMI is commonly referenced in terms of bariatric surgery candidates. BMI is a good indicator of a person’s weight category and health.

•    Underweight: BMI less than 18

•    Normal: BMI 18-25

•    Overweight: BMI 25-30

•    Obese Class I (Moderately Obese): BMI 30-35

•    Obese Class II (Severely Obese):BMI 35-40

•    Obese Class III (Very severely obese): BMI over 40

•    How good is BMI as an indicator of body fatness?

•    The correlation between the BMI and body fatness is fairly strong but even if two people have the same BMI, their level of body fatness may differ

Body Mass Index Chart (BMI Chart) - BASS Bariatric Surgery Center

In general,

•    At the same BMI, women tend to have more body fat than men.

•    At the same BMI, older people, on average, tend to have more body fat than younger adults.

•    At the same BMI, athletes have less body fat than do non-athletes.

The accuracy of BMI as an indicator of body fatness also appears to be higher in persons with higher levels of BMI and body fatness. While,a person with a very high BMI is very likely to have high body fat, a relatively high BMI can be the results of either high body fat or high lean body mass (muscle and bone).A trained healthcare provider should perform appropriate health assessments in order to evaluate an individual’s health status and risks.

Am I a candidate for weight-loss/bariatric surgery?

Struggling with one’s weight is a serious issue for many people. According to the Centers for Disease Control and Prevention more than one-third – 78.6 million adults in the United States are obese. Obesity can affect all aspects of your life from yourself-confidence to serious health implications like heart disease,diabetes and more. Obesity can be caused by many factors from life style choices to hormone conditions. Of course we strongly recommend scheduling a consultation with one of BASS Medical Group’s esteemed bariatric surgeons to learn more and determine if bariatric surgery is right for you.

weight loss bariatric surgery - bass bariatric surgery center


Certain criteria will determine if you are a candidate for bariatric surgery.

Here are some examples:

•    You are over your ideal body weight by 100 lbs. or more.

•    Your Body Mass Index (BMI) is greater than 40.

•    You suffer from serious health conditions as result of your weight including but not limited to: heart disease, high blood pressure and/or diabetes.

•    You are unable to reduce your body weight for a prolonged period of time through diet,nutrition and exercise.

•    You are between the ages of 14 and 75.

In addition to these criteria, it is also recommended that your weight gain is not the result of any of these situations:

•    You are not currently or recently pregnant.

•    You are not suffering from a condition that may have caused serious short-term weight gain.

Is Weight-Loss Surgery Right For You?

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Patient Success Story

Bariatric Surgery Specialists | Weight Loss Surgery Center in Walnut Creek and Brentwood
Before Surgery
After Surgery

My Weight-Loss Surgery Story

My name is Denise. I started my weight-loss journey in December of 2014 by visiting Dr. Chin. It was ten months of doctors’ appointments, weigh-ins, and medical tests. But I was focused and determined. Finally, my surgery date came. I was sleeved in October 2015, and it was the best decision I have ever made for myself. I was 57 years old at the time. I asked my surgeon, Dr. Chin, if I was too old for the surgery, and he said, “No one is too old to get healthy.” He was so very right. I was 310 pounds at my heaviest, pre-surgery. I was pre-diabetic, and had high blood pressure. My back, knees, and ankles hurt most of the time, and I was always short of breath. Those were just the medical conditions I had because of my weight. I was self-conscious and depressed. I was very unhappy. Surgery was a piece of cake (no pun intended). I was walking on the treadmill within two days. Soon, I was amazed at the transformation I was having, both in my weight loss and with my attitude towards food. As the weight loss kept happening, I was gaining my health back. I am no longer on blood pressure medicine, and I am no longer pre-diabetic. My knees, back, and ankles don’t hurt anymore because I am not carrying so much weight. I can walk and move around without being short of breath. My confidence has returned, and I am so much happier now that I am 100 pounds lighter. I swim a mile five days a week, and walk three to four miles every day, and I enjoy it. There are so many accomplishments that have come from losing weight like shopping in the regular size section, fitting in any chair, crossing my legs, not having to ask for an extension on the airplane, and the list goes on. The only regret I have is not having this surgery sooner. I would like to thank Dr. Chin and all of the staff involved in my life saving/changing surgery.

Denise Brown
Past Bariatric Surgery Patient

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Meet our Bariatric Surgeons

Bariatric Surgery Specialists | Weight Loss Surgery Center in Walnut Creek and Brentwood
bariatric weight-loss doctor brian t. chin

Brian T. Chin, MD, FACS

Bariatric Surgeon

Doctor Biography

Dr. Brian Chin was born and raised in the Bay Area. After graduating from Acalanes High School in Lafayette he ventured cross-country to coastal Maine, where he graduated magna cum laude from Bowdoin College with a bachelor’s degree in physics and mathematics. From there, he went on to earn a master’s degree in applied physics from Columbia University. He earned his medical degree at the University of Michigan Medical School, then returned to California for his surgery residency at the University of California at San Diego, where he won the Department of Medicine’s Halasz Award for surgical consultation and the Department of Surgery’s Chairman’s Prize for teaching and service excellence. Additionally, he served as administrative chief resident. Following residency, Dr. Chin completed a fellowship in bariatric and advanced laparoscopic surgery at the University of California at San Francisco, working alongside world-renowned leaders at the forefront of laparoscopic surgery. Dr. Brian Chin is board certified in surgery by the American Board of Surgery and in advanced trauma life support by the American College of Surgeons. Dr. Chin also serves as a trauma surgeon at the John Muir Medical Center, which is certified as a level II trauma center by the American College of Surgeons and is Contra Costa County’s only trauma center. He sees patients in Walnut Creek and Brentwood.

bariatric weight-loss doctor jason f. moy

Jason F. Moy, MD, FACS

Bariatric Surgeon

Doctor Biography

Dr. Jason Moy is a graduate of the University of Michigan, where he earned both his undergraduate degree from the Honors College and Master of Public Health degree in molecular epidemiology from the School of Public Health. Dr. Moy received his medical degree from Michigan State University. Following medical school, he completed a surgical residency at William Beaumont Hospital. There, in addition to surgical training, Dr. Moy was extensively involved in surgical research and had the opportunity to both publish peer-reviewed articles and present at national and international surgical meetings. After completing residency, Dr. Moy continued his surgical training in New York City as a fellow in minimal access and bariatric surgery in a joint program with Cornell Medical College and Columbia University at New York Presbyterian Hospital. In New York, Dr. Moy trained with pioneers in laparoscopic and bariatric surgery, Drs. Michel Gagner, Alfons Pomp and Dennis Fowler. He also continued surgical research, publishing multiple times, including a paper on laparoscopic sleeve gastrectomy technique. At Columbia, Dr. Moy was appointed a clinical instructor of surgery. Dr. Moy is an advanced laparoscopic surgeon, practicing the full scope of general surgery, bariatric surgery, and trauma surgery.