Child BMI Calculator & Facts
Child BMI Checker — Quick estimate & CDC category
Enter child’s age, sex, height and weight to calculate BMI and see which CDC percentile category the result falls into (informational only).
About This Child BMI Calculator
This simple tool lets parents and caregivers estimate a child’s Body Mass Index (BMI) and see where it lands on the CDC’s percentile chart for kids and teens ages 2–20. Just plug in your child’s age, gender, height, and weight, and it instantly shows whether the result falls in a healthy range, overweight zone, or underweight range. It’s a quick way to understand growth patterns and spot possible weight concerns early on.
Remember, this calculator gives a general idea, not a diagnosis. Children grow at different rates, and many factors—like genetics, nutrition, and activity level—play a role. For a full assessment, it’s always best to talk with a pediatrician.