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Body Mass Index – Risk factors

The BMI (Body Mass Index) gives information about ideal body weight. It is calculated using your body height and weight.

The calculation for BMI = Body Weight in kg) ÷ Body Height (in metres) squared

Adjust the scale below according to your values or fill them out in the spaces provided. Your current BMI will be displayed. You will find a guide below to help you interpret your result and to show you the ideal weight range for your height.

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BMI calculator


Metric system

kilograms (kg)
centimeters (cm)

It is normal for BMI to increase slightly with age:

BMI in related to Age 19-24 Years 25-34 Years 35-44 Years 45-54 Years 55-64 Years over 65 Years
Underweight BMI < 19 BMI < 20 BMI < 21 BMI < 22 BMI < 23 BMI < 24
Normal weight BMI 19-24 BMI 20-25 BMI 21-26 BMI 22-27 BMI 23-28 BMI 24-29
Overweight BMI > 24 BMI > 25 BMI > 26 BMI > 27 BMI > 28 BMI > 29


BMI does not take gender, stature, fat or muscle mass into consideration . According to BMI, some athletes and manual labourers may be evaluated as obese even though their fat percentage is low. It is therefore necessary to determine an individual’s body fat percentage in order to interpret the BMI correctly.

Additionally different criteria will apply for pregnant and nursing mothers, the sick, the elderly and growing children. The BMI can also class smaller people (less than 1.50 m) incorrectly as having a high BMI and very tall people (over 1.90 m) as having a low BMI.

To interpret BMI correctly it is important to take the individual’s physique into consideration.

Please note:

The health calculators do not replace medical advice, and can only act as a guide.