![]() BMI= Weight in Kilograms (Height in Meters) x (Height in Meters)ĭivide that answer by your height in meters again.įor example, a person who weighs 99.79 Kilograms and is 1.905 Meters tall has a BMI of 27.5. BMI= Weight in Pounds x 703 (Height in Inches) x (Height in Inches)ĭivide that answer by your height in inches.ĭivide that answer by your height in inches again.īMI can be calculated using kilograms and meters. BMI cut-offs for people of South Asian descent are different.īMI can be calculated using pounds and inches. 165 lbs x 703=28(64 inches) x (64 inches) To calculate an adult's BMI using the metric formulaĪ BMI between 25 to 29.9 is considered overweight. To calculate an adult's BMI using the English formulaįor example, a person who weighs 165 pounds and is 5 feet 4 inches tall has a BMI of 28. To calculate a child’s BMI, a person can use the CDC’s calculator for. Or you can easily calculate it from the CDC's online tool. The CDC use both age and sex assigned at birth in its BMI calculations for people between the ages of 219 years. In other words, by plotting your child's BMI value into the CDC's BMI-for-age growth chart, you can determine if your child is underweight, within normal range, overweight, or obese. The BMI-for-age percentile is determined by comparing your teen's weight to that of other teens of the same age and sex. An additional step must be done after the BMI has been determined using one of the formulas below. For children and teens ages 2 to 19 years, the BMI varies by age and sex. Although it's not a perfect measure, it gives a fairly accurate assessment of how much of your teen's body is composed of fat. The amount of fat is the critical measurement.Ī good indicator of how much fat your teen carries is the body mass index (BMI). It includes considering the amount of bone, muscle, and fat in his or her body. To obtain a z-score or percentile, first determine if the BMI is above or below the 95 th percentile by comparing it to the sex- and age-specific value of the “P95” column in the data table.Determining Body Mass Index for Teens What is body mass index?ĭetermining how much your teen should weigh is not a simple matter of looking at an insurance height-weight chart. Sigma is the dispersion parameter used in the calculation of BMI percentiles and z-scores above the 95 th percentile (z-score 1.645).Īge is listed at the half month point for the entire month for example, 48.5 months represents 48.0 months up to but not including 49.0 months of age.Ĭalculate the z-score and corresponding percentile for a given BMI The LMS parameters are the median (M), the generalized coefficient of variation (S), and the power in the Box-Cox transformation (L). This file contains the L, M, S, and sigma parameters needed to generate exact percentiles and z-scores from the 3 rd to 95 th percentiles by sex (1=male 2=female) and single month of age. A healthy BMI for an adult is 18.5 to 24.9, according to the CDC. Selected percentiles and z-scores with LMS and sigma parameters While BMI is calculated the same way for. 5, 1, 1.5) are identical to those in the data files for the CDC 2000 BMI-for-age growth charts. Newly developed percentiles above the 95th percentile up to the 99.99th percentile (z-scores up to 5), and LMS and sigma parameters for the Extended CDC BMI-for-age growth charts are contained in the following data files. Therefore, BMI formula is the calculator's basis and CDC BMI-for-age growth charts are used for results interpretation. But it's also important to talk to your child's doctor to help understand the results. ![]() ![]() You can use the KidsHealth BMI calculator below to find your child's BMI. The amount of fat is changeable along with age and differs between girls and boys. Body mass index (BMI) is a calculation that uses height and weight to estimate how much body fat someone has. BMI percentiles and z-scores up to the 95th percentile (z-score 1.645) are the same as those in the 2000 CDC BMI-for-age growth charts and the L,M,S parameters, selected percentiles (3rd, 5th, 10th, 25th, 50th, 75th, 85th, 90th, 95th), and z-scores (-2, -1.5, -.5, 0. Our BMI calculator for kids is specially developed for children and teens from 2 to 19 years old. ![]() Because children and teens are growing, the ranges of height, weight, and BMI vary by age and sex. The BMI calculator uses Standard or Metric measures and is available in English or Spanish. Child & Teen BMI Calculator Body mass index (BMI) is an anthropometric index of weight and height that is calculated by dividing a person’s weight (in kilograms) by the square of their height (in meters). The BMI Calculator is an easy-to-use online tool to help you estimate your adult patients' body fat. The Extended CDC BMI-for-age growth charts use a new method for calculating BMI percentiles and z-scores above the 95th percentile. For more information about BMI percentile and growth charts for children, visit the CDC's Child and Teen BMI and NHLBI's We Can web pages. ![]()
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