Ready when you are
Enter one or more measurements, then calculate to see percentile cards.
LittleArc tools
Growth percentiles, without the waiting-room math.
Enter a child's sex, age, and latest measurements to get an approximate percentile readout using the same compact reference-shape used by LittleArc's Phase 2 growth charts.
Calculator
Child measurements
Results
Percentile snapshot
Band chart
Where the measurements sit
Measurement rails will appear after calculation.
Reference bands at this age
Values are interpolated between compact monthly anchors.
| Metric | P3 | P15 | P50 | P85 | P97 |
|---|
Clinical disclaimer
This is a planning aid, not a diagnosis.
Percentiles are approximate and use a compact educational reference scaffold, not a clinically validated full WHO chart. Growth trends, gestational age, illness, nutrition, and measurement technique matter. Always review concerns with a pediatrician.
Frequently asked questions
- What is a growth percentile?
- A growth percentile shows how a child's measurement compares with other children of the same age and sex. The 50th percentile is the median; being on a steady curve usually matters more than the exact number.
- Is my baby's weight normal?
- Most healthy children sit anywhere between the 3rd and 97th percentile, and the trend over time matters more than a single reading. This tool gives an estimate only — discuss any concern with your pediatrician.
- Does this use the official WHO growth chart?
- It uses compact WHO/IAP-style reference bands as an approximate scaffold, not a full clinically validated WHO chart. Use it as a planning aid and confirm with your pediatrician.