Children and teens are still growing; CDC recommends age-and-sex-specific percentiles.
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Calculate BMI-for-age using CDC percentiles for people ages 2–19.
Unlike adults, children and teens use BMI compared with people of the same reference age and sex. The tool calculates BMI, approximate z-score, percentile and CDC category.
Children grow at different rates. Percentile compares BMI with the CDC reference population of the same age and sex, so it is more appropriate than fixed adult ranges.
Race is not part of the CDC BMI percentile calculation; age, sex, weight and height are the required inputs.
Paste the code into your HTML and the tool shows up on your page, without J-Kit's navigation and ads. It still runs in the browser of whoever visits your site.
<iframe
src="https://jkit.tools/embed/en-US/child-teen-bmi-calculator"
width="100%"
height="600"
style="border:0"
loading="lazy"
title="Child and Teen BMI Calculator"
></iframe>These references help contextualize formulas, standards, APIs and limitations used on this page. They do not replace professional validation when a result has legal, financial, medical or operational impact.
Children and teens are still growing; CDC recommends age-and-sex-specific percentiles.
Medical disclaimer: educational tool for ages 2–19. BMI percentile does not replace a pediatrician, dietitian or longitudinal growth assessment.
Percentile from 85 to below 95. It is a signal to discuss with a health professional.
BMI = kg/m²; percentile calculated with the CDC BMI-for-age LMS table (bmiagerev.csv).
Age, sex, height and weight stay in the browser and are not sent to analytics.