Rashid Centre for
Diabetes & Research

Calculate your bmi

Overweight and obesity is easily defined with the aid of the BMI (Body Mass Index) which is calculated with the aid of body weight and body height

For BMI values between 18.5 and 24.9 body weight is normal, between 25.0 and 29.9 is overweight and for BMI values of 30.0 or more is obese. The higher the BMI you have, the higher are the risks of various complications.

Aim for healthy weight control!

The advantage of BMI is that you can describe how normal or abnormal your body weight is in a single figure. The same BMI value however means different quantities of fat for men and women. For an average Swedish man a BMI of 25 corresponds to approximately 19.1 kg fat (23.6% of body weight) whereas for women fat quantity for the same BMI is 25.2 kg (36.4% of body weight). The corresponding value for BMI 30 is 28.4 kg (30.0%) for men, and 34.8 kg (43.2%) for women.1 For the same BMI women thus have more fat than men. BMI cannot in principle distinguish fat and muscles since the calculation of BMI is only based on body weight and height. The margin of error for the estimation of body fat with the aid of BMI lies at 7–9% which in practice means that for BMI 25.5 hesitation is advised concerning whether a person is normal weight (though muscle less) or overweight (with increased quantity of fat). On the other hand a person with BMI 35 always has obesity.

In spite of everything BMI is thus a simple, good measure of the degree of overweight and obesity.

You are encouraged to calculate your BMI .