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Are you confused about your BMI or how to calculate it? Or why even calculate your BMI?

Just sit back and relax, we will help you through the topic in stages and answer all your questions.

Let’s see what is BMI first.

What is BMI

The Body Mass Index (BMI) is a measure of your body fat based on your height and weight.

It is commonly used to classify people into different categories of overweight and obesity.

Now you know what BMI is, let’s see why calculate your BMI.

Why calculate your BMI

Because it’s important to know whether your weight is in healthy proportion to your height.

Also, knowing your BMI can help you determine all possible health risks you may face, if your BMI is off the healthy range.

Let’s see what happens if you’re overweight. It might trigger a range of chronic conditions, such as:

If you’re underweight, you may develop health issues such as:

  • Malnutrition
  • Osteoporosis
  • Anaemia


“BMI value is considered a benchmark for deciding if you’re overweight or underweight. So you can calculate your BMI from time to time to help your weight loss goals.”

How to calculate

You can simply do it online, and here is an Online BMI Calculator for your need.

Or you can calculate your BMI yourself and we will tell you how.

You can use the following formula to calculate your BMI:

Weight in kg x Height in m2 = BMI

For example, if you weigh 100kg and stand at 1.75m tall, then your BMI would be: 100 x 1.75² = 225.00

What should be your target BMI

For you, considering you’re an adult, an ideal BMI is in the 18.5 to 24.9 range.

For children and young people aged 2 to 18, the BMI calculation takes into account age and gender as well as height and weight.

Man body mass index info chart. (BMI Chart)

Infographic Designed by Freepik

If your BMI is:

  • below 18.5 – you’re in the underweight range
  • between 18.5 and 24.9 – you’re in the healthy weight range
  • between 25 and 29.9 – you’re in the overweight range
  • between 30 and 39.9 – you’re in the obese range

How accurate is your calculation

Use body mass index (BMI) as a standard health assessment tool, which is only approximate. Nothing less, nothing more.

Reasons why it is not entirely accurate can be seen as follows:

  • It’s not an accurate predictor of health, as doesn’t consider other factors of health.
  • Concludes all weight is equal
  • Doesn’t consider fat distribution
  • Might lead to weight bias
  • Might not be applicable to all populations


“In summary, BMI considers only your weight and height as a measure of health rather than your age, sex, race, body composition, medical history. While calculating your BMI is ok, you must not rely on its accuracy or authenticity entirely.”


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