# Body Mass Index Children US

This 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.

Instructions:
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.

BMI
Percentile
17.8
OK
40
Height
lbs
80
Weight
ft' in''
4'11"
Age
Yrs
12

Background

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.

References

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.

#934 Natalia 2019-04-21 06:57
Hi I’m 5’5 and I am really really overweight and I am not happy with my body. I weigh 170 and I am 12 years old. In the past I have been called fat many times and I really want to loose weight and make me feel better about myself. Please give me suggestions on how to loose weight.
#933 Dan the magic man 2019-04-20 04:35
Quoting Elizabeth:
I’m 5,1 or 5,2 I am 136 and 14. I’m wayyyyyy overweight and I really need tips to loose weight

Me too but I’m eleven and 131, you’re very short. Here you can take my steroids. Meet me in the alley of 7/11
#932 Elizabeth 2019-04-19 13:22
I’m 5,1 or 5,2 I am 136 and 14. I’m wayyyyyy overweight and I really need tips to loose weight
#931 Megan Elizabeth Kauf 2019-04-18 11:57
I am 17 years old I am 5'2 and weigh 89.9 I eat I just cant again weight I've been like this since I was little
#930 Dulcinea 2019-04-18 00:23
Hi my name is Dulcinea, I’m 13 and weigh 176 lbs and I’m 5’5. I’m not comfortable in my body because I’m kind of masculine with some muscle. I want to loose weight but it’s hard with my schools lunches and we don’t have enough money for food each lunch for school. So do you have any propositions?
#929 Kori Weber 2019-04-16 03:33
Im 12 years old. I am 5'9 and i weigh 120 pounds. Im really tall and beacuse of my weight i look normal not bony but i dont really have fat on my stomach. I struggle.
#928 natalia 2019-04-16 01:44
I’m 13, 5’5” and 180 pounds. What do I do? I really need help. I hate my body, I’m extremely fat.
#927 Loren 2019-04-15 23:54
Hi, i’m 10 turning 11 in July and I took a test and researched. I am 83lbs and the average weight for an 11 year old girl isn’t 81 and for a 10yo it’s 70. I really don’t know how to loose weight and I really want to. I also call myself fat and tell my parents i’m Not eating but that does nothing. I really am at a loss. Can you help me loose weight?
#926 tammmy 2019-04-15 12:44
Quoting Kate:
Hi I’m 13 years old. I am 5 feet and I weight 126.2 pounds. I am obesed. Can u help me lose weight

u r not obese i weigh 130 lbs and im 12
#925 ALLLA 2019-04-15 12:43
Quoting Maliha:
Hi I am Maliha. I am 18 years old. Height 5’4” and recently started going to the gym. Am I overweight? Honest answer please:) I’m trying to better myself:)

um - how much you weigh tho? tf
#924 Rylie Smith 2019-04-15 05:25
Im 12 and weigh 134 pounds I’m 5”3 and it’s saying I’m over weight any tips on how to lose weight
#923 Carly 2019-04-15 01:03
Quoting Carly:
I’m 13 years old and I weigh 78-80 pounds. A lot of people tell me I’m underweight, however, I feel as if my mom would encourage me to eat more if that was the case.
Am I underweight? If so, how much weight do you think I should try to gain?

P.S. I forgot to add that I’m around 4’11 maybe 4’12.
#922 Carly 2019-04-15 01:00
I’m 13 years old and I weigh 78-80 pounds. A lot of people tell me I’m underweight, however, I feel as if my mom would encourage me to eat more if that was the case.
Am I underweight? If so, how much weight do you think I should try to gain?
#921 Julianna 2019-04-15 00:41
I am 5' 3" and weigh 118 pounds. My legs are thick as hell. Please give me suggestions of how to lose weight asap at
#920 Julianna 2019-04-15 00:22
gurl, I'm 12 and 118lbs. I wish I was 100 lbs!!
#919 ... 2019-04-14 03:56
Hi. I'm 12 5'0 female and weigh 159 lbs. I feel I am obese and would like to lose weight fast. It's hard for me to lose weight..
#918 Maliha 2019-04-13 07:08
Hi I am Maliha. I am 18 years old. Height 5’4” and recently started going to the gym. Am I overweight? Honest answer please:) I’m trying to better myself:)
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#916 Kate 2019-04-12 21:34
Hi I’m 13 years old. I am 5 feet and I weight 126.2 pounds. I am obesed. Can u help me lose weight