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)


#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
#147 Savannah 2017-01-19 22:56
18 yr old female and 5'2 and currently 142.2.. not too long ago I was 135 :( any tips to lose quick weight? Ive been dieting and exercising.. not doing much
#146 Keri 2017-01-17 16:27
i am 5'4", 18 and when i weighted myself before it differed from 10.46st to 10.5st. when i change from metric to us and vice versa, it changes from me being an average weight to being just slightly overweight. Why is this? metric 24.8, us 25.2. just extra information, i am from england.
#145 Jer 2017-01-03 19:52
I am a 40 year old male, 5'8 and weigh 180 lbs.
#144 Breana 2016-12-31 07:41
BMI is BS. It does not take into account body type, muscle mass, or medical conditions. Ignore this. If you're worried about your weight, see a doctor.
#143 Sophia Hakeman 2016-11-08 02:48
I am nearing my 13th birthday I am 152 lbs, but I am 5'8 is that alright for a girl
#142 belle 2016-11-05 18:14
hi im a female soon to be 22 in a few months and at 5 foot 6, weighing 7.2 and i cant seem to get past it iv'e had medical tests etc and eat plenty and a balanced diet with lots of protein i have tried and exhausted every possible option to try and gain weight and struggle to just not loose the weight even eating constantly for months at a time just doesn't seem to work - i cant think of anything else to do i even tried calorie drinks and high calorie shots off doctors, family members and friends just keep saying my weight will catch up with me but im almost 22 and it hasn't, even my mams became concerned again with my birthday on its way and constantly feeling the cold in the winter - its getting tiring, what do i do? :/ i feel at such a loss right now about it, some people say im lucky and some saying i look ill and disgusting but it is not deliberate i need to find a way to gain weight. The more i age the more people say its disgusting i just want to be a healthy weight :L

Add comment

Comments can not be used for advertising

Security code