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BMI calculator

Calculate your Body Mass Index now – it's easy! The result is a guideline and does not replace a medical diagnosis.

kg
cm
15 18.5 25 30 40
Untergewicht Normal Übergewicht Adipositas

Note: BMI is a general guideline and does not replace a medical diagnosis.
If you have any questions about your weight or health, please seek medical advice.

What is BMI?

The Body Mass Index (BMI) is one of the best-known measures for assessing body weight in relation to height. It is used worldwide in medicine and also serves as a quick guide in everyday life to determine whether someone is underweight, normal weight, or overweight. For men in particular, the BMI can be an initial indicator of health risks such as cardiovascular disease, diabetes, or hormonal imbalances.

How is BMI calculated?

The formula for BMI is:

BMI = Body weight (kg) / (Height in m)²

For example: A man weighing 85 kilograms and standing 1.80 meters tall has a BMI of 26.2 – according to the WHO, this corresponds to being slightly overweight.

BMI values ​​and their significance

The World Health Organization (WHO) defines the following areas:

  • Underweight: below 18.5
  • Normal weight: 18.5 – 24.9
  • Overweight (pre-obesity): 25 – 29.9
  • Obesity grade I: 30 – 34.9
  • Obesity grade II: 35 – 39.9
  • Obesity grade III: from age 40

This classification makes the BMI a simple and internationally comparable measure of body weight.

Limits of BMI - why men should take a closer look

BMI alone doesn't tell the whole story about health. It doesn't take into account whether weight consists of muscle or fat mass. A fit, muscular man can therefore have a BMI in the "overweight" range even though his body fat percentage is low and he has no health risks.

Therefore, men should always consider BMI in combination with other measurements:

  • Waist circumference (ideally under 94 cm)
  • Waist-to-hip ratio
  • Body fat percentage (e.g., via bioimpedance or caliper measurement)
  • Visceral fat (abdominal fat in the inner abdominal cavity, particularly risky for health)

Abdominal fat is particularly critical, as it promotes inflammation, puts a strain on the metabolism and can negatively affect testosterone levels.

Health risks associated with an elevated BMI

A persistently elevated BMI of 25 or higher can promote various diseases:

  • High blood pressure and cardiovascular diseases
  • Type 2 diabetes
  • Lipid metabolism disorders
  • Joint problems and back pain
  • Sleep apnea
  • Testosterone deficiency and loss of libido

Especially with a BMI over 30, the risk of erectile dysfunction also increases, often triggered by narrowed blood vessels, hormonal changes and chronic inflammation.

Conclusion: BMI as a starting point, not as the sole measure

BMI is a helpful initial indicator, but it should not be the sole criterion for assessing health. Men especially benefit from considering waist circumference, body fat percentage, fitness level, and hormone levels in addition to BMI. This provides a more complete picture of their health and personal risk of developing diseases.

Do you have any questions?

Here is an overview of the most frequently asked questions and answers.

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