Child Growth Percentile
Calculate exact weight-for-age percentiles and Z-scores using the official World Health Organization (WHO) LMS algorithms (0-5 Years).
Max age: 60 months (5 years). Formula uses exact WHO daily LMS parameter lookup.
Weight-for-Age
About this calculator
This tool compares a child's weight with WHO growth curves for age and sex. It is an approximation for 0-60 months; always confirm with your child's growth chart.
Results are for information only and are not a diagnosis. Consult a doctor for medical advice.
Frequently asked questions
What percentile is healthy?
Anywhere roughly between the 3rd and 97th, if growth follows a steady curve.
Should I worry about a low percentile?
The trend matters more. Discuss falling across percentile lines with a paediatrician.
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