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- The body mass index (BMI) is a quantity which makes it possible to estimate the body build of a person.

- The BMI is a convenient rule of thumb used to broadly categorize a person as underweight, normal weight, overweight, or obese based on tissue mass (muscle, fat, and bone) and height.

- BMI corresponds to the weight (in kg) divided by the square of the height (in meters).

- The World Health Organization (WHO) has defined the body mass index as the standard for assessing the risks linked to overweight.

Body mass index (BMI):

Enter height in centimeters and your weight in kg to calculate your body mass index:

Your height: centimeters

Your weight: Kg

Your body mass index (BMI): kg/m^-2

Be careful with the interpretation of the BMI calculation: for the same BMI, the body composition can indeed vary from one individual to another.
For example, a top athlete or a pregnant woman will have a high BMI without having excess body fat.

More information on the body mass index - BMI:
   - Wikipedia: Body mass index (BMI)
   - WHO: Obesity and overweight

This formula for calculating the ideal weight is simple and very often used. The calculation takes into account only the size and the gender:
For a woman, the ideal weight = Size - 100 - ((Size - 150) / 2.5)
For a man, the ideal weight = Size - 100 - ((Size - 150) / 4)

Ideal weight according to Lorentz:

Enter your height in centimeters and specify your gender to calculate your ideal weight:

Your height: cm

Your gender: Women Man

Estimate your ideal weight: Kg
Your weight seems excessive if it exceeds: Kg