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BMI (body mass index) calculator

First of all, what is BMI?

Simply, a person's BMI, or body mass index, is a numerical measure of a their weight compared to their height.
It's primary use is within the health professions as an objective assessment of a patient's weight.

Because of its simplicity it is often inappropriately used to determine a person's 'fatness' or 'thinness'. Importantly, it does not take into consideration the body's composition, for instance, a well-trained body-builder with large muscle bulk would be given a BMI that might suggest they are over-weight. Conversely, the very weak-limbed, huge tummy physique might return a healthy BMI index.

As far as runners are concerned (assuming they are not very muscle-bound), it does give a reasonable indication of where you fall on the scale of a 'healthy' weight, especially when combined with an honest look in the mirror.

To find your BMI, enter your measurements below and look at the scale to see where you're at.

Height:
Weight:
 

What does your BMI mean?

Below 18
Underweight, although some elite runners fall into this category.
18-24
Normal
25-30
Over-weight
30+
Obese

 

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