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)


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#156 Anna 2017-12-11 02:47
my BFF is 94lbs and is physically active she is 16yrs 5'2 she said she doesn't think she fat and she used to fast in 6th grade but not any more that she just doesn't feel like eating and i trust her. me and her boyfriend try to get more but she hasn't gained much weight and she gets constant belly aches and for the past 2yrs doctors can't figure out whats wrong, should i worry or is she still healthy.
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#154 Callie 2017-12-08 01:00
I’m a 17 year old girl who is 5’6 but I only weigh 96 pounds. I was already underweight at 106 pounds but I became vegan and that diet and sometimes not eating caused me to loose weight. I just don’t know how to gain any back and my friends keep saying they are worried about me...
#153 Angel 2017-07-04 20:59
Im Angel (angel is not my real name I'm using my nickname) I'm 18 i will be 19 on july 16th (2017) and I'm 135.2 pounds and i just eat all types of food and i walk a lot to maintain my energy and it helps me a lot I'm 5 foot 6 inches in height which is somewhat average but when i turned 18 i began to accept myself for who i am and what i look like
#152 Drema 2017-06-29 04:29
Hi, my names Drema and I'm 16 years old. I am 5'0-5'1/2inches and weight 117lbs. I looked up the weight of an average 16 year old female with my height and it says 105-115. My body is not fat or chubby, I've been in sports. So my body type is average to athletic, haven't played in awhile. Anyway I've noticed I'm 2lbs over the average weight does that mean I'm fat or not? I noticed I gained some weight in my stomach but not much. I can notice cause it's my body but no one else can. So am I overweight even? Should u exercise it off?
#151 Lauren 2017-06-18 23:03
Hi I'm lauren I'm 15 year old female I am about. 5'8 and a half and I want to know how much I should weigh
#150 Austin 2017-06-14 04:06
I'm a 5'8 18 year old male, when I started college I was 165lbs, kinda teetering on the edge of being overweight, was always kinda self-conscious about it, but it was never that bad. I'm about to get out of my freshman year and I'm now nearly 200lbs and I feel horrible. How am I going to get rid of all this?
#149 Alex 2017-06-13 17:16
I'm 14, 5'9 and 117 lbs but BMI is 17.4. I'm considered "under weight". I've tried so many websites and there all the same. I definitely don't look under weight, I'm trying too lose it but it's telling me too gain?! I feel like I look terrible but it's saying it's normal ?
#148 Jordan h 2017-05-19 03:00
I'm 17, 5'2 and I weigh 150, I'm looking for the best tips

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