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.


#680 Yailleene 2018-07-21 12:00
My friend is 5’3 or 5’4 and she weighs 136.4 lbs. I am 5’2 or 5’3 and I weigh 140 lbs is am I overweight??? Or am I normal?
#679 Aliya 2018-07-21 11:54
I am 5’3 5’4 at height and I way like 136.4 pounds. Am I overweight??? I feel like I am and I should consider exercising more. :(
#678 Emia 2018-07-19 23:10
I am 13, 155 pounds and 5'5". Do I need to lose weight? My body shape is probably somewhere between hourglass and pear. Big hips and thighs but a smaller waist
#677 skylar 2018-07-19 21:24
i am a 14 year old girl and i weigh 87 pounds. all my friends are like 110 to 120 and i feel so skinny. i eat regularly and i work out like 2 times a week. what can i do to gain more weight
#676 Taylor 2018-07-19 17:53
I’m a 15 year old female who’s 5’8 and weighs 119.0
Most girls my age are in the 120’s – 130’s. Am I underweight or just right for my size??
#675 Matthew 2018-07-18 18:01
I am 14.5 years old, I am 6 ft tall, and I weigh 275 lbs. I feel disgusted with the way I look and feel and I want to do something to change it. I've tried working out bit I haven't seen any results yet, please help.
#674 Londyn 2018-07-17 14:40
I’m 13 and I’m 5’9. I’m a female and weigh 235 pounds. I definitely obese, right? I hate my body shape and myself because I look terrible. I want to lose at least 100 pounds. What should I do to accomplish that?
#673 Yasmin 2018-07-16 11:08
Срочно кредит кредит
под залог недвижимости киев без справки о
#672 Evan 2018-07-16 08:45
14yrs old 5”0 and 70 pounds how do I gain weight? Everyday I feel like I’m going to starve to death even though I eat 3 meals a day.
#671 jayc 2018-07-14 23:24
am i fat? i'm 5 '5 and 129 lbs.. (be honest bitches) also i'm 12.
#670 Gg 2018-07-14 14:56
Quoting Elliot:
Hello, I’m 15 years old, and my height is 5’10. I weigh 113.5 pounds, and I’m a male. Is this a healthy weight, or should I consider losing more?

B*itch tha f*ck, ur underweight. Don’t loose more weight ur fine
#669 Elliot 2018-07-13 21:56
Hello, I’m 15 years old, and my height is 5’10. I weigh 113.5 pounds, and I’m a male. Is this a healthy weight, or should I consider losing more?
#668 Marianna 2018-07-13 19:13
Quoting Lailah:
I'm 13 and 5'1 I weigh 145 pounds. I hate myself. Everyone in my grade is so small and like 120 pounds. Am I honestly obese.

You are in the range for your height. Don't bash yourself. Everyone has there own, body shape, metabolism, and genes. You are perfect the way you are!
#667 Marianna 2018-07-13 19:09
Quoting Vale:
Hello all! I’m a 10 year old girl and I weigh 88 lbs. I’m currently about 5’3. Am I overweight?

Your under weight, you should at least 90-100. But you are growing still. Wait till you are 13. You shouldn't be worrying about that yet. You are still a kid. Wait till you are in your teens 13-19
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