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A healthy weight can be determined by using the body mass index and by measuring the circumference of the waist. BMI is intended for people over age 20, according to WebMD.


According to WebMd, the Body Mass Index (BMI) calculator is the basis for the recommended height and weight scale. The BMI is used to calculate all weight guidelines for people over the age of 20. The CDC provides a separate BMI calculator for people younger than 19.


A person can find an age-based height and weight chart for children online at the United States Centers for Disease Control and Prevention and Baylor College of Medicine. In addition to charts that relate, age, height and weight, there also are charts and tools for children's body mass index, or BMI


Both boys and girls stop growing in height at the end of puberty. This makes the age slightly different for girls and boys; girls typically reach the end of puberty around age 17 to 18, and boys at the age of 18 to 20.


ExtremelySmart.com has an ideal weight calculator based on height, age and frame size. Body mass index, or BMI, is commonly used to determine a normal weight range, but it only uses height for adults; age is only a factor for children and teens.


To find your BMI, multiply your weight in pounds by 703, take your height in inches and square it, then divide the former by the latter. Websites, such as the site for the National Heart, Lung and Blood Institute, offer BMI calculators as of March 2015.


Age is not commonly used as a factor in determining the ideal weight of a person unless determining the ideal weights between an adult versus a child. Separate standards for ideal weights exist for children under 20, according to the Centers for Disease Control and Prevention. Body mass indexes, wai


Percentiles are used as a clinical measurement to ascertain the growth and size patterns for children in the United States. The Centers for Disease Control and Prevention has developed a Body Mass Index calculator, and the World Health Organization has published growth charts. Both provide a healthy


Charts for age, height and weight are used to provide a rough reference to determine how a child or teenager is developing, specifically whether he is underweight or overweight. Height/weight charts can be found online, or a doctor can consult one to provide a professional opinion.


An increase in height is possible after the age of 21, but humans stop gaining height once puberty ends, generally between the ages of 16 and 18. However, some people do not finish puberty until their early twenties, states Teen Health Source.