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Child Growth Percentile Calculator

Get a simplified estimate of whether your child's height and weight fall below, at, or above the typical average for their age.

Enter Child's Details

Sex

Age

years

Height

Weight

Result

Live

Height Band

Average

Weight BandAverage

This tool provides a simplified, approximate estimate only — it is not a clinical growth chart. Consult your pediatrician's growth chart for clinical accuracy.

This is an estimate for informational purposes only and is not medical advice. Consult a healthcare provider.

How to Calculate & Formula Details

Mathematical Model FormulaCompares child height/weight against simplified average-by-age reference bands (not clinical percentile curves).

This tool gives a simplified, approximate comparison of your child's height and weight against typical average values for their age. It is designed as a quick, general reference only.

Not a Clinical Growth Chart

Pediatricians use detailed CDC or WHO growth percentile charts, which track a child's growth trajectory over time relative to thousands of data points. This calculator uses a simplified banding approach (below average, average, above average) and cannot replace those clinical tools.

Frequently Asked Questions

Is this the same as the percentile chart my pediatrician uses?

No. This is a simplified estimate for general reference only. Your pediatrician's growth chart tracks your child's specific growth trajectory over time using clinical CDC or WHO percentile data, which is far more precise.

My child is "below average" - should I be worried?

Not necessarily. Height and weight vary widely between healthy children. A single measurement matters less than a consistent growth trend over time, which only your pediatrician can properly assess.

Does this account for premature birth?

No, this simplified tool does not adjust for gestational age. Premature babies are typically measured against adjusted-age growth charts by their pediatrician.

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