Body Mass Index Children US

BMI children USThis module calculates Body Mass Index for children from age 2 to age 18 and classifies the result according to the guidelines given by the U.S. Department of Health & Human Services. It also has an optional evaluation of height in relation to age.

1. Enter values for gender, height and weight.
2. The result is interpreted within four categories: Underweight (<5th percentile), Healthy weight (5th-85th percentile), Overweight (85th-95th percentile) and Obese (>95th percentile).
3. Please note, that BMI is only a very rough predictor for overweight in individuals.

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For adults, the body mass index limits for overweight and obesity are straight forward (overweight = BMI > 25 and obesity = BMI > 30). For children this is much more complicated as the limits vary a lot depending on age. This calculator uses the US guidelines that are based on fixed percentiles from a large reference population. 

A BMI of 20 indicates obesity in a 6 year old girl, whereas it would represent healthy weight for a 13 year old girl. However, as growth of children varies, the final evaluation should always be based on a several factors including physical growth, muscularity and subcutaneous fat deposits.

The calculator also includes the possibility to evaluate height in relation to age. If the child/youth scores in the high percentile range on height (above average) this could indicate that physical development is ahead of chronological age. As higher BMI is expected with increasing age (above age 6), this information can assist in a qualified evaluation of BMI.


The Centers for Disease Control and Prevention (CDC). BMI - Body Mass Index: BMI for Children and Teens.

Mei Z, Grummer-Strawn LM, Pietrobelli A, Goulding A, Goran MI, Dietz WH. Validity of body mass index compared with other body-composition screening indexes for the assessment of body fatness in children and adolescents. American Journal of Clinical Nutrition 2002;7597–985.

Hammer LD, Kraemer HC, Wilson DM, Ritter PL, Dornbusch SM. Standardized percentile curves of body-mass index for children and adolescents. American Journal of Disease of Child. 1991; 145:259–263.

Pietrobelli A, Faith MS, Allison DB, Gallagher D, Chiumello G, Heymsfield, SB. Body mass index as a measure of adiposity among children and adolescents: A validation study. Journal of Pediatrics. 1998; 132:204–210.


#794 fds 2018-12-18 18:30
Lol are you 4'9? Midget bitch go kys faglord
#793 jaslynn 2018-12-18 04:26
i'm 5'5-5'7 and i'm almost 15 and weigh around 145 lbs. is this unhealthy or overweight even though i'm a runner?
#792 Michel nuemer 2018-12-17 23:48
Quoting Cass:
I'm 12, 5'3, and weigh 97.7 pounds. Is this obese for my age and height?

No definetly not. You are probably on the slender side. I workout minimally wit( a slightly healthy diet) i am 4’9 and 89 pounds. This says I’m not overweight and so does my doctor but I look terrible. Even my freinds don’t believe my weoght so I had to show them myself on the scale to prove it (I swear they are good friends, they didn’t make me. I just wanted to prove it) my thhighs are gaint and I have nice chance for a bright gap even if I wanted one. I think my hips are too narrow for that. My face, legs and stomach collect all of my fat, where my chest is flat, my arms are noodles and my fingers are bony. I hate how disproportions I am. Kids st schoo jokingly call me pudgy and say I’m squishy it’s fine but it makes me so mad at i do rescrict my diet a little and at least excerscise a little when my friends don’t and look thin.
#791 Kid 2018-12-15 21:17
I am 12 and I’m 97 pounds
Is that bad?
#790 Linnea 2018-12-14 23:33
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#789 Gabrielle 2018-12-14 03:24
I am about 5'3, 13 years old and 107 pounds am I overweight? If so, how many pounds do I lose?
#788 Zoe Stafford 2018-12-13 15:29
I am 9 years old but I am 148 pounds. I am 5 feet exactly. I just don't understand how I try everything but for some reason I can;t lose weight. Please give me some advice because I cannot go outside because my parents won't allow me so please help me and I cannot do inside activities because my house is to small so please help me.
#787 lorraine 2018-12-13 04:31
im almost ten and in 109 pounds is that normal
#786 Tayla 2018-12-12 21:22
Quoting Kiki:
I’m 12 years old 125 pounds and 5’ 1” am I overweight because my doctor said I’m not but this says I am.

Well, it all depends on muscle mass and a whole lot of other biological factors. So you may be, or you may not be. Hope this helps.
#785 Kiki 2018-12-12 01:08
I’m 12 years old 125 pounds and 5’ 1” am I overweight because my doctor said I’m not but this says I am.
#784 Tanise 2018-12-07 01:16
I am 14yrs old i weigh 140lbs I have a big butt and thighs i am 5'4 or 3 but I'm i over weight for my age ??
#783 Macie 2018-12-04 01:18
Quoting Rip:
Quoting Macie:
So I am 13, Female 147.4 LBS But most of my weight are in my thighs / butt
But a small amount in my stomach. So is 147.4 a healthy weight for me?
#782 Vallen 2018-12-02 22:36
I’m 14 years old and I weight 155 pounds and have a big butt and thighs bc I was born with it.I don’t look fat AT ALL in other peoples prospective and mine but the number tricks me. Im I really over weigh or is it just my big butt and thighs that adds those extra pounds?
#781 Vero 2018-12-01 13:44
Quoting bella:
I'm 5'1 and 128 lbs but I workout a lot so idk what to do

Well, working out isn't the only thing you have to do in order to lose weight. It's simple! Dieting. Exercising wouldn't be needed to lose weight if you diet, too. It's only there to lose minor calories. Remember, dieting is 80% of how you lose weight. Excerising is the other 20%.
#780 Vero 2018-12-01 13:41
Quoting Unknown:
10.5/4’11/136 pounds boy. Am I morbidly obese

I am a thirteen year old girl who's around 5'4~5'5 and 136 pounds would lead up to me being overweight. Let alone a ten year old, who's 4'11.
#779 Cass 2018-11-26 19:40
I'm 12, 5'3, and weigh 97.7 pounds. Is this obese for my age and height?
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