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Body Mass Index Calculator





Calculate your BMI on this page. The well-known Body Mass Index is used as a gauge of over- and underweight.





The founder of the Body Mass Index is Quetelet.


I'd like to add a little extra info to the Body Mass Index. More than is usually given. So please continue to read on after the calculator.






Your length :

Your weight



Press the button, don't click Enter


Your Body Mass Index is :






So now that you know your BMI... what is a high and what is a low BMI ?

Normally the following general figures are used :

BMI < 20 ::Underweight

BMI < 25 ::Normal weight

BMI > 25 ::Overweight

BMI > 30 ::Obese



The Body Mass Index is an indicator of overweight and so, also, for the risk people run to get heart and/or artery diseases. Insurance companies use the BMI for example.


Is it a good indicator of cardiovascular problems ?
First read these comments to the Body Mass Index and then judge for yourself :


BMI is dependent on both length and weight. The weight of children grows faster than their length. BMI is therefore not so useful for children.


When you are older the opposite happens : older people keep the same weight, but they decrease in length. So for elderly, the BMI is not that useful too.


Tall people can't really use the BMI as well. For them weight divided by length to the third degree would be a more useful criterium.


Big people with lots of muscles (bodybuilders, big bad basketballplayers / footballplayers) can't use the Body Mass Index either. Muscles have a higher relative weight than fat.


Asian people generally have lower body fat. A BMI higher than 20 can already be a serious indicator of being overweight for an Asian person.


So using BMI as an indicator of obesity is not so useful for quite a few people. More than half of the world population actually... :)


So, be a bit careful when interpreting the results.

Your score is over 25 ?
Well, if your belly is not too big, if you regularly exercise and you are eating healthy, you don't have much to worry about.

Score lower than 25 ?
Good for you, but sorry, look at your belly, your exercise pattern and your eating habits first, before you decide you are healty !



Interested in more useful running information ?
Subscribe to the Best Running Tips Newsletter or to my site blog !



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