Know your BMI

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.

BMI Range Category
Less than 16 Severely underweight
From 16 to 18.5: Underweight
From 18.5 to 25 Normal (healthy weight)
From 25 to 30 Overweight
From 30 to 35 Obese Class I (Moderately obese)
From 35 to 40: Obese Class II (Severely obese)
Over 40 Obese Class III (Very severely obese)
View more information about BMI


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)/ HEIGHT2  (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


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/ HEIGHT2  (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.

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