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)

#158 Racjel 2018-01-16 21:03
Listen ladies. I'm a 21 year old girl. I'm 127lb now. When I was 14 I started to gain weight. At 16 I was 150lb. 18 for my highschool graduation I was 145~ a few years later of doing absolutely nothing and not changing my eating habits at all, I lost all that weight. If you're still in your teens don't fret about the weight you have now cause your body is still changing and it'll continue to change all your life. Don't sweat it y'all
#157 Felicia 2018-01-09 09:10
I’m 22, I weigh 101 pounds, the most I’ve ever weighed. I know it seems like I should have or had a disease but actually no, I’ve been this little since I could remember. I actually remember going to the doctor around 5th grade weighing about 50 pounds or less and the doctor told me I was very healthy because I was following my families I guess you could say small footsteps (ha ha) but this isn’t my concern. My concern is my weight now, I feel like I’m at a good weight but I also feel almost overweight because I’ve been underweight my whole life. I also went through a lot of stress a year ago with a job & ex boyfriend that led to weighing only 80 but as of now I have gained 20 pounds. So my question is, should I gain more or stay the same? I’m also not certain if this is a “just state a opinion or ask of opinions” type site but I guess I’ll find out.
#156 Ellie Rae 2018-01-04 05:49
I’m 18 and weigh 98 pounds at 5’2. I enjoy all junk food but have been blessed/cursed and unable to gain weight which is bad since I need to gain weight.
#155 Julissa Janelle Moli 2017-12-14 17:18
I'm 17 years old I'm a female and my height is
5'7 or 5'8 what should be my weight for my age and height?
#154 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.
#153 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...
#152 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
#151 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?
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