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BMI
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BMI Categories (WHO)

    All about BMI (Body Mass Index)

    The Body Mass Index (also known as BMI) is a measure that allows you to quickly and reliably estimate the body mass of an adult (men and women over 18 years old). Recognized by the World Health Organization (WHO), it is the official indicator used worldwide to assess weight-related risks.

    How is BMI calculated?

    The mathematical formula is simple: it consists of dividing the weight (in kilograms) by the square of the height (in meters). The same equation applies to both men and women, making our calculation tool particularly simple and direct.

    BMI = Weight (kg) ÷ [Height (m) × Height (m)]

    Interpretation of your result

    Once your result is calculated, it is compared to the official body weight curve to determine your situation:

    • Normal weight (18.5 to 25): You are within the recommended weight range for your height. Health risks are at their lowest.
    • Overweight and Obesity (> 25): A result over 25 indicates excess weight (pre-obesity, mild, severe, or morbid obesity), which increases the risk of cardiovascular diseases, diabetes, and other medical complications.
    • Underweight (< 18.5): A result under 18.5 reflects insufficient body mass that can cause deficiencies or indicate other underlying health problems.

    Limitations of this calculation

    While BMI is an excellent general indicator, it has some limitations. It does not distinguish between bone mass, muscle mass, and fat mass. For example, a highly muscular athlete can have a BMI corresponding to "overweight" without having excess fat. Conversely, an elderly person who has lost a lot of muscle might have a normal BMI despite having a high body fat percentage. It remains a primary statistical indicator that should be discussed with a healthcare professional.