The Kids BMI Calculator computes your child's body mass index (BMI). You'll learn whether your child's BMI falls into an underweight, healthy weight, overweight, or obese range.

How the children’s BMI chart has changed. The previous iteration of the chart, released in 2000, was based on data collected between 1963 and 1980, when levels of obesity among children were lower.

To calculate the BMI percentile -- which is also called "BMI for age" -- a health care provider or an online tool like WebMD’s FIT Kids BMI Calculator takes a kid's BMI (along with age and ...

In recent decades, severe obesity among children in America has nearly quadrupled, experts said. The old scale, which went up to 37, has been in use for more than two decades, ...

WASHINGTON — U.S. health officials have revised a tool to track the rising cases of severe obesity among children who were previously off the charts. Updated growth charts released Thursday by the ...