Baby growth percentile chart
See where your baby falls on the WHO growth chart. Enter their birth date, sex, and a measurement to calculate their percentile for weight, height, or head circumference.
Growth Percentile Calculator
Enter your baby's details and a current measurement to see their WHO percentile.
How to read growth percentiles
A growth percentile compares your baby to thousands of other babies of the same age and sex. The 50th percentile is the median — half of babies measure more and half measure less. Being at the 20th percentile doesn't mean your baby is too small. It means 20% of babies are smaller.
Pediatricians care more about the trend than the number. A baby who's consistently at the 25th percentile is growing perfectly. A baby who drops from the 75th to the 25th over a few months might need a closer look. The curve matters more than any single point.
This calculator uses the WHO Child Growth Standards, based on a study of 8,440 healthy breastfed infants across 6 countries. It's the standard used by pediatricians in most countries for children under 5.
Sources
- WHO Child Growth Standards (MGRS) — World Health Organization, 2006
- WHO Multicentre Growth Reference Study — de Onis et al., Acta Paediatrica, 2006
- Growth Charts for the United States — CDC / National Center for Health Statistics
Track growth over time, not just today
nappi plots every measurement on a WHO percentile chart and shows the trend. One tap to log weight, height, or head circumference.