📈 Baby Growth Percentile Tracker
See roughly where your baby's weight, length, or head size sits for their age and sex — a simplified WHO/CDC percentile estimate for the first two years.
📈 Percentile estimate
| P3 | P15 | P50 | P85 | P97 |
|---|---|---|---|---|
| 7.61 | 8.51 | 9.6 | 10.69 | 11.59 |
Bands are modelled from the WHO/CDC median for the nearest reference age (12months). This is a simplified educational estimate only, NOT a plotted growth chart and NOT medical advice — always have your pediatrician or doctor measure and interpret your child's growth.
The curve matters more than the number
A baby in the 10th percentile who tracks steadily along it is usually thriving, while a baby who tumbles from the 75th to the 25th between visits is what prompts a closer look. Percentiles describe where a child sits in a big population, not a grade to beat — small and large babies are both perfectly normal.
Use this estimate between check-ups to satisfy your curiosity, then rely on your pediatrician's plotted charts, which use the full WHO and CDC standards and your baby's complete history.
❓ Frequently Asked Questions
What does a growth percentile mean?
A percentile compares your baby to a reference population of the same age and sex. A weight in the 50th percentile means about half of babies weigh less and half weigh more. Anywhere across the range can be perfectly healthy — what matters most is that your child follows their own curve steadily over time.
Which measurements can I check?
Weight, length (height), and head circumference — the three measurements taken at routine well-baby visits. Choose the measurement, your baby's sex, and age, then enter the value to see the estimated band.
How does this tool estimate the band?
It uses an embedded, simplified set of WHO/CDC median values for 0–24 months and models the percentile edges from a typical spread for each measurement. It snaps to the nearest reference age, so it is an approximation rather than a precisely plotted chart.
My baby is in a low or high percentile — should I worry?
Not on its own. A single number matters far less than the trend across visits. A sudden jump or drop across bands is what pediatricians watch for. Bring any concerns to your child's doctor, who plots the official charts and knows your baby's history.
Is this medical advice?
No. These are general educational estimates only — NOT medical advice; always consult your pediatrician or doctor. This tool is not a substitute for a professionally measured and plotted growth chart.