Baby & Child Growth Percentile Calculators
Track your child’s growth using WHO, CDC, Chinese National, and Olsen preterm standards. Free, accurate calculators with interactive percentile charts.
Not sure which chart to use? Our guide helps you pick the right one based on your child’s age, location, and needs.
Which Chart? →WHO (0-24 Months)
WHO (0-5 Years)
WHO (5-19 Years)
CDC (0-36 Months)
CDC (2-20 Years)
Chinese National
Down Syndrome / Zemel
Preterm / Olsen
Other Tools
About Growth Standards
Our calculators use growth standards from multiple authoritative sources. The WHO Child Growth Standards describe how children should grow under optimal conditions and are recommended for children under 2 years in the United States. The CDC Growth Charts are the standard reference for children and adolescents ages 2–20 in the US. The Chinese National Standard charts are based on Chinese National Survey data. The Olsen charts provide intrauterine growth curves for premature infants.
All growth chart calculators use the LMS (Lambda-Mu-Sigma) method, the same statistical approach used by pediatricians worldwide to convert raw measurements into percentiles and Z-scores. The Height Predictor uses the Khamis-Roche method to estimate adult height from current measurements and parent heights.