Body Mass Index

Body mass indexThe Body Mass Index is a simple indicator of the relationship between your height and your weight. If your BMI is above 25 you are considered overweight and if your BMI is above 30 you are considered obese.

1. Measure your height and weight and enter values
2. Note that the intepretation of the result do not apply to people whith an abnormal muscle mass.

Normal weight
ft' in''


Body mass index is a useful tool for assessing overweight in populations. It is however a very unprecise evaluation of overweight on an individual level as muscularity and general frame size of the body is not taken in to account.

Classification of overweight in relation to BMI

BMI (kg/m2)
Normal weight
Obesity class I
Obesity class II
Obesity class III
> 40



Preventing and Managing the Global Epidemic of Obesity. Report of the World Health Organization Consultation of Obesity. WHO, Geneva, June 1997.

Quetelet LAJ. Sur I'homme et le developpement de ses facultes, ou essai de physique sociale. Paris: Bachelier, 1835. (The original BMI-reference)

#192 Waldo 2018-12-16 01:50
Quoting Allen Smajic:
i’m in 11th grade, 5’8”, weigh 117.5lbs. i can see my shoulder bone and can slightly see my ribs. am i underweight? how to i make my shoulder bone not noticeable?

Lucky, I wish I would be able to be that weight.
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#190 Allen Smajic 2018-12-06 15:18
i’m in 11th grade, 5’8”, weigh 117.5lbs. i can see my shoulder bone and can slightly see my ribs. am i underweight? how to i make my shoulder bone not noticeable?
#189 Piper rosewood 2018-12-03 01:55
I am 135 pounds, 5'2 and is 17 years old am I overweight?
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#187 Selena 2018-10-18 19:38
I am 1.63m tall and I weigh 48kg. Am I fat?
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#185 Amy 2018-10-17 09:15
Quoting Jacob Feagley:

I am a 17 year old, 5'5 male and I weigh around 92 pounds. I eat only slightly less than the average person my height and age. Am I considered anorexic, severely underweight, or just underweight?

You are underweight. Anorexia is an eating disorder, not what they call people who are underweight. If you starve yourself because you believe you are fat, you may be anorexic. If you are worried about developing anorexia or (if you have anorexia), speak to your GP.
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