BMI Calculator for Children and Teens

Body mass index (BMI) is one way to estimate a person's body fat that takes into consideration the person's height. BMI is calculated using a person's weight and height. In children and teens, BMI is used to find out if a child or teen is underweight, of a healthy weight, overweight, or obese. A child's body fat changes with age. Also, girls and boys differ in their amount of body fat as they mature. This is why BMI for children, also known as BMI-for-age, includes gender and age.

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10 Jun 2014 --- Mother and daughter (8-9) exercising in living room --- Image by © Tetra Images/Corbis

How to Get Your Child Up and Moving 

Motivating children takes creativity. Here’s how you can get your child up and moving, doing activity that doesn’t include a video screen or television.

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Five Myths About Dyslexia 

When you begin to investigate the reading disorder dyslexia, you’ll run into a number of myths that will distract you and your child or set you back.

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Allergy Relief for Kids 

Despite advances in allergy treatments, sometimes allergy relief for kids is a matter of simply keeping them inside when certain allergens are in the air

What Do You Know About Cystic Fibrosis?

Cystic fibrosis (CF) is an inherited disease that mostly affects the respiratory and digestive systems. About 30,000 children and young adults in the U.S. have CF. Most of them are descendants of people from northern Europe. Find out more about CF by taking this quiz, based on information from the National Institutes of Health.

1. CF affects which body system?
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The sweat glands and the reproductive system usually are involved, as well. A person with CF makes too much thick, sticky mucus. This clogs the air passages in the lungs. It makes the person more likely to get an infection. The clogged passages also make it harder to breathe. The sweat of a person with CF often is saltier than normal. Thick secretions also clog the ducts of the pancreas. This keeps digestive enzymes and other chemicals made by the pancreas from helping with digestion. Most men with CF are infertile. Most women with CF have difficulty getting pregnant.