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BMI for Children (Age-Adjusted Percentile) Calculator

BMI-for-age percentile categories per CDC/WHO charts.

Calculates adult BMI = weight(kg)/height(m)² and maps it to a child-adjusted category by age: <5th percentile underweight; 5–84th healthy; 85–94th overweight; ≥95th obese.

Priya Venkatesan By Priya Venkatesan
Published Last reviewed 1 min read

Inputs

kg
m
yr

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

BMI = kg/m²; age-adjusted percentile from simplified lookup.

In depth

Calculates adult BMI = weight(kg)/height(m)² and maps it to a child-adjusted category by age: <5th percentile underweight; 5–84th healthy; 85–94th overweight; ≥95th obese.