How To Calculate BMI | Body Mass Index Calculator


Are you searching for how to calculate BMI, so you are at right place. Body mass index is a simple calculation using a person’s height and weight.

Body Mass Index is use to measure the body fat based on height and weight that applies for both adult men and women.

You can do this calculation on your own by using this formula in which you just have to measure your weight in kilograms and measure your height in meters squared.


What is Body Mass Index (BMI)

Well, Body Mass Index (BMI) is a simple calculation which is use to measure the body fat based on height and weight that applies for both adult men and women.

This index helps you to know whether you are underweight, normal weight, overweight, or obese based on your height and weight. If want to know that how to calculate BMI, It is computed as the square of a person’s height in meters divided by their weight in kilograms (kg/m2).

After that your BMI is then calculated and compared to a standard BMI chart to see if they are underweight, normal, overweight, or obese.

Body Mass Index Categories

On the scale of bmi, if your index is under 18.5 than you are undeweight. And if your BMI is between 18.5 to 24.9 than it is considered as normal weight. If your BMI is between 25.0 to 29.9 than it is considered as overweight. Or if your BMI is more than 30.0 than it is considered as obese.

Body Mass Index Calculator

If you are looking for how to calculate BMI, you can use are BMI calculator to calculate your Body Mass Index.

BMI Calculator

Body Mass Index Table

<16Severe Thinness
16-17Moderate Thinness
17-18.5Mild Thinness
18.6-24.9Normal Weight
30-35Obese Class I
35-40Obese Class II
>40Obese Class III

Who shouldn not use a BMI calculator

While BMI calculators can provide valuable insights into one’s health status, there are certain groups for whom BMI may not be the most accurate or appropriate measure. It’s essential to recognize that BMI has limitations and may not account for individual differences in body composition and other factors. Here are some groups for whom BMI calculators may not be suitable:

  1. Athletes and individuals with high muscle mass: BMI does not differentiate between muscle mass and fat mass. Therefore, athletes or individuals with significant muscle mass may have a higher BMI despite being healthy and fit.
  2. Older adults: As people age, their body composition changes, with a tendency to lose muscle mass and bone density while gaining fat. This shift in body composition can affect the accuracy of BMI calculations, particularly in older adults.
  3. Children and adolescents: BMI charts for children and adolescents account for age and sex differences in growth patterns. However, interpreting BMI in younger individuals requires additional considerations and should be done in consultation with pediatricians or healthcare professionals.
  4. Pregnant women: Pregnancy leads to temporary changes in weight and body composition, making BMI less useful as a health indicator during this time. Healthcare providers typically use alternative methods to assess the health of pregnant women.
  5. Individuals with certain medical conditions: Some medical conditions, such as edema (fluid retention), can affect body weight and alter BMI calculations. In such cases, healthcare professionals may use alternative methods to evaluate health status.


In conclusion, while BMI calculators offer a convenient way to assess health status based on weight and height, it’s crucial to recognize their limitations. BMI may not provide a complete picture of an individual’s health, especially for certain groups such as athletes, older adults, children, adolescents, pregnant women, and individuals with specific medical conditions.

However, understanding BMI and its implications can still be valuable for many individuals as part of a holistic approach to health and wellness. It can serve as a starting point for conversations with healthcare professionals and motivate lifestyle changes aimed at improving overall health.

Ultimately, while BMI is a useful tool, it’s just one piece of the puzzle when it comes to assessing health. Embracing a balanced lifestyle that includes healthy eating, regular physical activity, stress management, and seeking guidance from healthcare professionals can contribute to optimal health and well-being.

So, whether you’re within a healthy BMI range or not, remember that health is multifaceted, and small steps towards wellness can make a significant difference in the long run. Let’s strive for health and happiness, one step at a time.

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