'Estimated lean body mass as an index for normalization of body fluid volumes in man.' Am J Physiol 1984 247: F632-5 James, W. Note: height (h) is in centimeters and age (a) in years.Īccording to the formula of Peck's (1974) In the formulas above, W is the body weight in kilogram and H is the body height in centimeter. For women: IBW = (h − 100) − ((h − 150)/2)Īccording to the formula of Lorentz (accounting for age).Note 1: Applied for age greater than 18 years old and height (h) between 140 and 220 cm (55 to 87 inch)Īccording to the formula of Lorentz (1929) According to the formula of Devine (1974) So, it is better to use the BMI based values above. The calculator can be used for anyone from two to 20 years of age. It is only an approximate measure of the best weight for your health.
These formulas are somewhat outdated and should, possibily, be avoided, except in some particular cases. Body mass index calculator for children and teenagers This calculator measures body mass index (BMI), which is a measure of body fat. Notice that the majority of websites uses one of the methos below. Here are other values based in other methods. However, beginning in 2003, the prevalence of obesity, and thus the average BMI, started to go decrease slightly, according to the Centers for Disease Control and Prevention.There are many ways (formulas) to calculate the ideal weight. Much of this change appears to have occurred starting in the 1990s, according to the Journal of Adolescent Health study. This is because the average height only increased by 0.3 inches for girls and 0.7 inches for boys, while the average weight increased by over 12 pounds for girls and over 15 pounds for boys. According to an article published in the CDC's publication Advance Data From Vital and Health Statistics in 2004, the average BMI for adolescents between the ages of 12 and 17 increased by more than 4 units between 19. This means that the average BMI for adolescents has been increasing as well. Please note: This calculator provides a general guide to. Step 3 Multiply the step two value by 703. The BMI will now display when the mouse is hovered over the grey marker tooltip for the BMI scale. Step 2 Divide your weight in pounds by the step one value. It is important also to plot the height and weight separately on the main 2-18 chart. Where severe over- or underweight is a concern, or where there is a need for monitoring over time, BMI can be calculated and plotted on this chart. Step 1 Multiply your height in inches by itself. GIRLS UK Body mass index (BMI) 2-20 years The BMI centile is a simple and reliable indicator of thinness and fatness in childhood. The number of children who are obese has been increasing over the past 40 or so years, according to the Centers for Disease Control and Prevention, but it has recently started to level off. BMI Weight (lb) ÷ height 2 (in 2 ) × 703. For example, the average BMI for an 18-year-old was 22 in the 1980s, but increased to 24.5 by the year 2000, according to a study published in the Journal of Adolescent Health in 2012.
BMR is not the number of calories you should consume each day Its the amount of calories your body burns in one day, assuming you did not move out of. also known as your Basal Metabolic Rate (BMR). This isn't exactly the same as the current average BMI for adolescents, however, as the data used for these charts dates from 1963 to 1994. What it is: The number of calories your body burns in one day, assuming you did not even move out of bed the entire day. For girls, the range is between 18.7 and 21.3. According to the BMI-for-age charts, the 50th percentile, the midrange for BMIs for a given age, for 13- to 18-year-old boys ranges from about 18.5 to about 22.4.