Estimate baby and child growth percentile from WHO and CDC charts.
Enter age, sex assigned at birth, weight, and height to estimate baby or child weight-for-age and length/height-for-age percentiles from WHO and CDC growth chart data.
Ages
0-16 years
Charts
WHO + CDC
Measures
Weight + height
Calculator
Plot your child
Child age
Years
Months
Sex assigned at birth
Live growth chart
Weight and height together
Enter measurements, then watch the chart plot them.
The animated dots and dashed projection appear here, beside the form, so the result is visible the moment you calculate.
A chart reader, not a growth diagnosis.
Baby growth is interpreted from patterns over time, not one measurement. This calculator does not assess feeding, hydration, prematurity, illness, measurement error, or whether growth is healthy for your child.
Source-backed
Uses WHO/CDC LMS parameters for weight and length or stature, with CDC 2000 data from age 2 through 16 years.
Parent-friendly
Turns growth-chart math into one readable percentile while keeping the limitations visible.
Connected to Doola
After pregnancy, Doola still helps parents check food, labels, household products, and newborn questions with calmer source-linked guidance.
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What do baby weight and height percentiles mean?
A percentile compares a child's measurement with a reference growth chart for children of the same age and sex. For example, an estimated 50th percentile is near the median in that reference data. A single percentile is not a diagnosis and should not be used by itself to judge health.
Which growth chart does this calculator use?
For babies under 2 years, this Doola tool uses WHO-style weight-for-age and length-for-age LMS parameters. From age 2 through 16 years, it uses CDC 2000 weight-for-age and stature-for-age LMS parameters. CDC recommends WHO standards for children from birth to 2 years and CDC growth charts for children and adolescents 2 years and older in the United States.
Can I use this instead of a pediatrician growth chart?
No. This page is an educational calculator for understanding growth chart terms. Pediatricians look at repeated measurements, measurement quality, birth history, feeding, health context, and the baby's growth pattern over time.
Why does the calculator ask for sex assigned at birth?
WHO and CDC growth reference tables are published separately for boys and girls, so the calculator needs that chart choice to estimate weight and height percentiles.
What if my baby's percentile seems very high or very low?
Do not panic from one number. Recheck the age, units, and weight measurement, then ask your pediatrician or child health nurse if you are worried or if your baby's growth pattern has changed.
Growth chart sources