There are two common ways to determine whether a person’s weight forms a health risk. Firstly, by calculating the BMI (Body Mass Index) and secondly by measuring the waistline.

Body Mass Index

The Body Mass Index is a standard for the assessment of body weight based on a simple formula: weight (kg) / height (m) x height (m). A BMI between 18,5 and 25 is generally considered ideal.

Example: 62 kg / 1,67 m x 1,67 m = 22


The BMI values are as follows:

  • 40: severe or morbid obesity
  • 30-39,9: obesity
  • 25-29,9: overweight or pre-obese
  • 18,5-24,9: healthy weight
  • < 18,5: underweight
Calculate your BMI


The perimeter of the waist is a standard for the accumulation of fat in the abdominal region. The ideal waistline for men is under 94 cm. For women, it’s under 80 cm.

Obesity causes

Would you like more information about obesity? This video clearly explains the causes of obesity. After all, obesity isn’t just a matter of lifestyle, but an illness that requires medical treatment.

Dr. Yannick Nijs contact | Obesity Centre Brussels

Dr. Yannick Nijs
Obesity surgeon

St-Michel Europe Hospitals
150 Linthoutstraat, 1040 Brussels

+32 470 588 537
+32 2 614 37 20

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