Baby Growth Percentile Calculator
Estimate where a baby's weight falls relative to typical WHO growth-chart percentiles for their age.
Approximate percentile
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Typical range for this age —
A rough estimate only — for accurate growth tracking, use your pediatrician's official WHO/CDC growth chart, which tracks trends over multiple visits.
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How it works
Percentile estimated from age-adjusted mean and standard deviation for a normal growth distributionFrequently Asked Questions
What does a growth percentile mean?
A baby at the 60th percentile for weight weighs more than 60% of babies the same age and sex in the reference population — it's a comparison to a population, not a grade of health on its own.
Is a low or high percentile a cause for concern?
Not by itself — pediatricians care much more about a baby tracking consistently along their own curve over time than about hitting any specific percentile. A sudden significant drop or jump across percentile lines is what typically prompts closer attention.
Should this replace my pediatrician's growth chart?
No — this gives a rough, simplified estimate. Your pediatrician uses official WHO or CDC growth charts with exact age-in-days precision and can properly interpret trends over multiple visits, which this single-point tool cannot replicate.