Everyone has heard of the so-called Body Mass Index (BMI). But what exactly is the BMI? And how do you calculate it? I will answer these and other questions in this article. Have fun!

What Is The Body Mass Index?

The BMI was developed by Adolphe Quetelet and Ignaz Kaup.

The Body Mass Index is a measure that can be used to calculate whether you are underweight or overweight.

Two numbers are decisive here:

  • Your height
  • Your body weight

However, the BMI is only a rough guide. It does not take into account gender or physical condition.

This means that the classifications are not always correct.

How Do You Calculate Your BMI?

It’s easy to calculate your BMI. Here you simply divide your body weight (kg) by your height (m) ².

For example, if you were 1.70m tall and weighed 60kg, the calculation would look like this:

60: 1.7² = 20.8

In this case you have normal weight. Now you can first calculate your BMI before we look at the results in the next chapter.

Are You Underweight?

When you have calculated your BMI, you can see where you can classify in the corresponding table:


  • Underweight: under 19
  • Normal weight: 19-24
  • Overweight: 25-30
  • Obesity: 31-40
  • Severe obesity: over 40


  • Underweight: under 20
  • Normal weight: 20-25
  • Overweight: 26-30
  • Obesity: 31-40
  • Severe obesity: over 40

No matter what comes out of your calculation, you must be aware that this is a guideline. No more, no less.

You may be genetically predisposed to be slim. If you are underweight, this is not the end of the world.

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