Body Mass Index or more commonly known as BMI is often used by healthcare professionals in order to determine whether any particular person is underweight, has normal body weight, overweight or is clinically obese. Obese people tend to develop associated diseases like hypertension, high level of cholesterol, respiratory problems, certain types of cancers, sleep apnea, stroke and more. Needless to say, determining the body weight classification play a major role towards getting a proper obesity treatment. In fact, generally one must have a certain BMI range to avail any obesity surgery procedure.

**How to calculate BMI – Adults**

BMI can be calculated in two different ways, i.e., the metric system and the imperial system.

**METRIC SYSTEM**

A person is required to know his body weight in **kilograms** & his body height in **meters**. BMI is measured by dividing the body weight by square of the height.

**For Example**

**Formula: BMI = WEIGHTS (KG)/ HEIGHT ^{2 } (M)**

Weight 90 kilograms

Height 1.9 meters (6 feet)

1.9 * 1.9 = 3.61

90 divided by 3.61 = BMI is 24.93

**IMPERIAL SYSTEM**

The person’s weight in **pounds**, multiplied by 703, divided by the square of their height in **inches**.

**For example:**

**Formula: WEIGHTS (LB) x 703/ HEIGHT ^{2 } (IN)**

Weight 190 lbs

Height 72 inches (6 feet)

72 * 72 = 5,184

190 multiplied by 703 divided by 5,184 = BMI is 25.76

**How to determine your body weight status**

**The standard measure of BMI:**

If the BMI is below 18.5, then the person is underweight

If the BMI is between 18.5 – 22.5, then the person has a Normal weight

If the BMI is between 22.6 – 27, then the person is overweight

If the BMI is between 27.6 – 32.5, then the person is Class 1 obese

If the BMI is between 32.6 – 37.5, then the person falls under class 2 obesity

If the BMI is between 37.6 – 49.9, then the person falls under class 3 obesity

If the BMI is over 50, then the person is SUPER OBESE

Despite being a global parameter of obesity, it has exceptions. BMI has some drawbacks, i.e., the measurement that it provides is without considering the body fat content, muscle tissues, and bone density. An athlete might have a higher BMI than that of a couch potato. But, he would not be considered as obese or overweight because he has a high muscle-to-fat ratio. Hence, BMI may always not depict the correct result. However, it still remains the most widely used parameter.

Obesity can be properly evaluated under expert guidance of medical professional like nutritionist and **bariatric surgeons** offering reliable obesity treatment, including **weight loss surgery**.