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The Average Height and Weight by Age

by |
author image Chris Callaway
Chris Callaway started writing professionally in 2007 and has worked as sports editor, managing editor and senior editor of "The Racquet" as well as written for the "La Crosse Tribune" and other newspapers in western Wisconsin. He graduated from the University of Wisconsin-La Crosse with a Bachelor of Arts in English and communications.
The Average Height and Weight by Age
Until age 12, boys and girls are similar heights and weights. Photo Credit Jupiterimages/liquidlibrary/Getty Images

Height and weight charts are used by pediatricians to help determine how big a child may grow up to be. For adults, those same charts can be used to determine whether you are overweight and at risk for certain medical conditions such as heart disease.

Girls -- Two to Eight Years

A 2-year-old girl has an average height of 34 inches and a weight of 27 pounds. By age four, the average height is 40 inches and the average weight is 34 pounds. At age six, the average height is 45 inches and the average weight is 46 pounds. An 8-year-old girl has an average height of 50 inches and an average weight of 58 pounds.

Girls -- 10 to 14 Years

At 10 years old, the average girl is 54 inches tall and weighs 72 pounds. By age 12, the average height has raised to 59 inches and the average weight is at 92 pounds. 14-year-old girls are an average of 63 inches tall and 109 pounds.

Girls -- 16+ Years

After age 14, girls' height begins to level off. The average height of a 16-year-old girl is 64 inches tall, while the weight is 119 pounds. From age 18 on, the height tapers off between 64 and 65 inches while the weight increases to about 130 pounds.

Boys -- Two to Eight Years

The average height of young boys is relatively similar to that of young girls. 2-year-old boys are on average 34 inches tall and weigh 28 pounds. At age four, they are 40 inches tall and weigh 36 pounds. By age six, boys are an average of 45 inches tall and weigh 46 pounds. 8-year old boys have an average height of 50 inches and weigh 56 pounds.

Boys -- 10 to 14 Years

At 10 years old, boys are 55 inches tall and weigh 70 pounds on average. By age 12, those figures raise to 58.5 inches and 90 pounds. At age 14, boys are on average 64 inches tall and weigh 112 pounds.

Boys -- 16+ Years

From age 16 and beyond, boys continue to grow more rapidly than girls. A 16-year-old boy is on average 68 inches tall and weighs 134 pounds. From age 18 on, boys are on average between 69 and 70 inches tall and weigh between 148 and 160 pounds.

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