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Child BMI Percentile Calculator

Result

Calculated result 0.2222222222 Based on the values entered.
↗ Health

Child BMI Percentile Calculator Find a child's BMI and which CDC percentile category it falls into. Enter the child's sex, age, weight, and height, and this calculator returns their BMI plus the underweight, healthy, overweight, and obese ranges for their — free online calculator.

Formula

BMI = weight (kg) ÷ height (m)²
  • Child BMI Percentile Calculator calculates its result from Weight Kg, Height M. It uses the formula BMI = weight (kg) ÷ height (m)². Change any input to recalculate the result instantly. This is an informational calculation and is not medical advice.
  • The main inputs are Weight Kg, Height M. Enter them in the units and format shown in the calculator.
  • Use the measurement units shown beside each field. The result is an estimate and should be interpreted in context.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Child BMI Percentile

Inputs
  • Weight Kg: 2
  • Height M: 3

Using Weight Kg = 2, Height M = 3, the calculated result is 0.2222222222.

Sample result: Calculating…

Frequently asked questions

What does the Child BMI Percentile calculate?

Child BMI Percentile Calculator Find a child's BMI and which CDC percentile category it falls into. Enter the child's sex, age, weight, and height, and this calculator returns their BMI plus the underweight, healthy, overweight, and obese ranges for their — free online calculator.

Which values should I enter?

Enter Weight Kg, Height M using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: BMI = weight (kg) ÷ height (m)².

Why might my result differ from another source?

Results can differ because measurement methods, rounding and assumptions vary. This calculator is an estimate and is not a medical diagnosis.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 7, 2026