WHO (0–2 years) · CDC (2–18 years)
Baby, Child & Teen Growth Chart Generator
Enter your child's measurements to see where they land on the official growth curves — and what that really means.
Based on clinical growth standards from the World Health Organization (WHO 0–2y) and Centers for Disease Control and Prevention (CDC 2–20y), endorsed by the AAP.
Sex
Units
⚕️ Informational only — not a diagnosis. Percentiles are a screening tool. Premature babies, children with medical conditions and measurement errors can all affect results. Always review growth with your pediatrician, who looks at the whole trend over time.
WHO baby growth charts and CDC child growth charts
In U.S. clinical care, CDC recommends WHO standards from birth to age two, then CDC charts from age two onward. This generator plots weight and length against WHO standards under two and weight, height and BMI against CDC references from two through eighteen. Head circumference uses a CDC reference through age three; the baby calculator uses WHO head-circumference standards through 24 months.
Choose the chart for the measurement you took. Weight-for-age does not account for a child’s length. BMI-for-age starts at two here and is a screening measure, not a diagnosis. A change when switching charts at age two can reflect different reference populations or a switch from lying-down length to standing height.
How to read a growth curve
- Find your child’s age on the horizontal axis and their measurement on the vertical axis. The colored dot marks the measurement you entered.
- Compare the dot with the 5th, 25th, 50th, 75th and 95th percentile lines. The 50th is the median, not the ideal weight or height.
- Bring dated measurements to your pediatrician. A series of accurate measurements is more informative than one result; a connecting line is not a forecast.
What if my baby’s weight percentile drops?
A change from the 64th to the 58th percentile does not, by itself, diagnose poor growth. Different scales, clothing, age rounding and normal variation can change a result. Compare measurements taken consistently, then look at the pattern alongside feeding, length and development.
Discuss a sustained downward trend, weight loss or feeding concerns with your pediatrician. Poor feeding, fewer wet diapers or unusual sleepiness need prompt medical advice rather than repeated online calculations. Do not change formula concentration or try to reach the 50th percentile without clinical guidance.
Measurements that make the comparison more useful
- Record the measurement date, exact age, units and whether length was measured lying down or height standing up.
- Use the same reliable scale when possible. Avoid comparing a clothed home weight with an unclothed clinic weight.
- Have length and head circumference checked at a visit; small measuring errors can noticeably change their percentiles.
Corrected age for a premature baby
Corrected age subtracts the weeks a baby arrived before 40 weeks of pregnancy from their age since birth. For example, a 16-week-old baby born at 32 weeks has a corrected age of 8 weeks. AAP guidance uses corrected age when following premature babies’ development during the first two years.
This estimate does not change the chart above or saved measurements. Ask your pediatrician which age and chart to use before entering a corrected age. Babies still before their due date may need a specialist preterm chart rather than a WHO chart.
Growth chart questions parents ask
Is the 10th percentile too low?
Not necessarily. It means about 10% of the reference population of the same age and sex has a lower measurement. Your pediatrician considers the growth pattern and overall health; a percentile alone cannot determine whether a baby is underfed.
Is this a CDC baby weight percentile chart?
For babies under two, the weight comparison uses WHO standards, as CDC recommends in the United States. The growth generator switches weight and height to CDC references at age two; the percentile calculator’s Child mode reports CDC BMI-for-age, not weight-for-age.
Can I compare a breastfed baby with these standards?
Yes. WHO standards use the breastfed infant as the normative model. A breastfed baby’s pattern may differ from older CDC infant references, especially after the early months.
Why is my result different from the doctor’s chart?
Check the measurement, units, age, sex and reference standard. Rounded ages, corrected age for prematurity and different measurements can produce different results. Ask which standard the clinic uses rather than treating either number as a diagnosis.
Related baby growth and development tools
Sources and limitations
Reference curves are sampled and interpolated from WHO/CDC LMS data. These educational tools do not replace clinical assessment or a specialist chart for prematurity.
- CDC: Using WHO Growth Standard Charts
- WHO: Child Growth Standards
- CDC: Growth charts and reference data
- AAP: Corrected Age for Preemies
Guide updated November 8, 2026.
This tool is for general information and education only. It does not replace advice from your child's pediatrician, who knows your child's full history.