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Body Mass Index (BMI) Calculator

A Body Mass Index (BMI) Calculator helps determine if one's weight is healthy or not. Get more information.

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Home / Health Insurance / Calculators / Articles / Body Mass Index Calculator

Body Mass Index (BMI) Calculator
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Body weight alone may not be the best parameter to assess one’s health. For instance, two people of the same age may have the same body weight but may not be equally healthy. For a person who is tall, a certain weight may be normal, whereas the same weight for a short person may be problematic. That is where Body Mass Index comes into the picture.

What is Body Mass Index?
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Body Mass Index (BMI) is an estimated measure of your body fat. It is often used by healthcare providers as a tool to evaluate your body mass to evaluate any risk factors associated with high body mass, like diabetes, hypertension, heart disease, and stroke. BMI is not an accurate measure of how fat an individual is and is only a rough estimation of health. 

Your body mass comprises your muscles, fat, bones, and all your internal organs and components. BMI uses the ratio of your total body mass to your height as an estimation of your body fat content. This helps give an approximate idea of whether you fall in the healthy weight range or not. Healthcare providers use BMI as a screening tool to assess the likelihood of developing other chronic metabolic conditions. 

How to find out your BMI
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You can find out your Body Mass Index by using a BMI calculator, such as the one available on the Centers for Disease Control and Prevention’s website. 

You have to ensure the parameters are in the correct units. Enter your weight in kilograms and height in metres, or weight in pounds and height in feet and inches.

Here is the revised range of reference of BMI for a South Asian population for you to understand if you are at a healthy weight or not.

Nutritional Status

Body Mass Index 


Less than 18.5


18.5 to 22.9


23 to 24.9

Obesity Type 1

25 to 29.9

Obesity Type 2

More than 30

Having a BMI less than 18.5 may indicate that an individual is more prone to the following. 

A higher BMI puts one at more risk for the following. 

BMI is not an accurate tool for risk assessment. There are multiple other factors that have established direct causative relation to the above disorders that take precedence over BMI. Here it is only used as a screening tool. Not every individual with a high BMI has a high body fat percentage.

Points to remember
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There are several conditions in which BMI may not be an accurate measure. Here are some reasons why. 

Frequently Asked Questions
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Here’s a list of common questions and answers related to BMI calculators.


Why is having a healthy BMI important?

On average, people with a healthy weight and BMI are less likely to develop metabolic conditions like diabetes, hypertension, and heart disease in the long run. They are also less likely to get chronic joint pain and have better sleep.

What should I do if my BMI is too high?

If your BMI is higher than the normal range, your doctor may suggest that you lose weight (especially if you have weight around the abdomen). This can be achieved by eating sufficient fruits, vegetables, and protein, regular exercise including both cardio and strength training, and a regular sleep schedule.

What should I do if my BMI is too low?

If you are underweight, you may need to take a close look at your diet and assess if you are eating enough. You can gain weight in a healthy manner by introducing more complex carbohydrates and protein rather than opting for saturated fats or desserts. Strength training may also help.

Disclaimer: The content on this page is generic and shared only for informational and explanatory purposes. Please consult a doctor before making any health-related decisions.