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, ...

BMI, or body mass index, is an outdated measurement that fails to properly identify health risks, according to a new study.

But just under 11% of kids see their BMI remain the same between ages 1 and 3.5, researchers found. After that, from age 3.5 to 9, their weight rises rapidly.

The U.S. Centers for Disease Control and Prevention has a child and teen BMI calculator. SOURCE: Environmental influences on Child Health Outcomes, news release, May 22, 2025.

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 ...