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Calculate your body mass index (BMI) and your ideal weight

Calculation of your Body Mass Index (BMI):

- 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

Interpretation table for BMI calculation:
IMC (kg/m-2) Interpretation
under 16,5 Severely underweight
form 16,5 to 18,5 Underweight
form 18,5 to 25 Normal (healthy weight)
from 25 to 30 Overweight
from 30 to 35 Obese Class I (Moderately obese)
from 35 to 40 Obese Class II (Severely obese)
over 40 Obese Class III (Very severely obese)

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

Calculation of your ideal weight according to Lorentz formula:

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