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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.

He worked out that there was a reasonably useful relationship between weight and lenght of your body.

Note, that 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 you have tried 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.
Body Mass Index

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!

Some governments are starting to move away from using BMI as the measure of health. Instead they usually include a few measures like waist-to-hip ratio and waist measurement.

Have you worked out you are overweight? Then why not set yourself a goal right now! Work out how much weight you need to lose to get in the healthy range (BMI < 25). And then...? Start running for weight loss!

New to running? Then you may want to check out the beginner running tips section. It will help you get started with running in no time.





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



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Running Calculators
BMI Calculator | Calories Burned Calculator | Heart Rate Monitor Training Zones (Karvonen Method) | Heart Rate Monitor Training Zones (Zoladz Method) | Race Conversion Calculator



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