Health & fitness
Child BMI Calculator
Review age- and sex-specific BMI-for-age guidance for children and teens using the CDC reference workflow.
Interactive calculator
Use the official CDC child and teen BMI calculator
Child BMI requires sex- and age-specific percentile data, so this page embeds the official CDC calculator for children and teens ages 2 to 19.
Results
Official source
CDC BMI widget
Results and percentile categories come from CDC growth-chart references.
How to use it
- 01Open the embedded CDC child and teen BMI workflow from the page.
- 02Enter the child's age, sex, height, and weight in the official tool.
- 03Review the BMI-for-age interpretation instead of using adult BMI bands.
Result guide
- Children and teens are interpreted by percentile, not by the adult underweight-to-obese scale.
- This page is for screening and growth discussion, not for diagnosing a condition on its own.
- A pediatrician should review results when a child has growth, nutrition, or activity concerns.
About this calculator
Child BMI cannot be interpreted with adult cutoffs because age and sex change the expected growth pattern. A useful production page should point parents to a percentile-based workflow instead of pretending one adult formula answers the question.
This page therefore keeps the calculation experience aligned with the CDC child and teen BMI reference tool, which is more honest than showing a simplified local estimate without percentile context.
Frequently asked questions
Why is a child BMI page different from the regular BMI calculator?
Because pediatric BMI has to be interpreted against age- and sex-specific growth percentiles rather than fixed adult thresholds.
Does this page replace pediatric advice?
No. It supports screening and discussion, but growth concerns should still be reviewed with a clinician who has the child's full context.
Method and limitations
This calculator uses the formula and assumptions described on this page. We do not claim independent professional review. Direct references will be listed here when they support a specific rule or data source used by this calculator.
Results are estimates for general information. Verify current rules and assumptions before making financial, tax, or health decisions.
Read our Editorial and Verification Policy →Related calculators
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