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Growth calculator
Estimate weight and height percentiles from WHO/CDC curves.
Educational estimates only — not medical advice. Growth uses WHO/CDC curves. Always check with your pediatrician.
Results
Enter a weight or height to see a percentile.
Educational estimate only. Not a diagnosis or care plan.
Growth percentiles compare your baby's weight and height to reference curves from WHO and CDC data. They help you see where measurements fall relative to other babies the same age and sex.
A single percentile is not a diagnosis. Trends over time matter more than one reading. Bring questions to your pediatrician.
Frequently asked questions
- What do percentiles mean?
- A percentile shows what percentage of babies the same age are smaller than yours for that measurement. The 50th percentile is roughly average.
- WHO or CDC — which curves?
- We use WHO growth standards for infants and young children, with CDC curves commonly referenced after 24 months, aligned with your country setting.
- Is a high or low percentile a problem?
- Not automatically. One point on a curve does not diagnose a health issue. Your clinician looks at trends, feeding, and overall wellbeing.
- Do I need an account?
- No — calculate free anytime. Sign in with Google only if you want to save results to your baby's shared timeline.
- How accurate is this?
- Percentiles are estimates from standard reference data. Home scales and measuring technique add variation. Use clinic measurements when possible.
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Educational estimates only — not medical advice. Growth uses WHO/CDC curves. Always check with your pediatrician.