Why do BMI percentiles matter?
The same BMI can mean different things during growth, so percentile context matters more than adult bands.
BMI percentile calculator
A percentile helps place a child BMI against a reference population of the same age and sex.
How should you read the percentile result?
A percentile is not a diagnosis. It helps decide whether nutrition, growth, or health needs closer review.
What does the site show?
After reference data wiring, the site will show category and explanation without creating a profile.
Resources
BMI articles and guides
Child BMI calculator
For children and teens, BMI is compared with age- and sex-based reference ranges instead of adult thresholds alone.
BMI by ageAge determines whether BMI should use adult thresholds or pediatric reference ranges.
Child BMI assessment standardsFor children and teens, BMI is interpreted with age- and sex-based reference standards such as WHO, CDC, or IOTF. Learn when each standard fits and why adult cutoffs do not.
Calculate and assess BMI
Check the result in the browser or open the app on your platform for more convenient regular use.