Pediatric growth calculators for WHO and CDC references, BMI, growth change, corrected age, and family-height context.
Standalone pediatric growth calculators
Six independent calculators cover WHO baby growth, CDC child growth, BMI screening, two-date growth change, corrected-age timing, and family-height context. Choose the workflow that matches the question and measurements you have.
Each calculator works on its own in this browser. No account, onboarding, or saved child health record is required. Results are transparent reference information—not diagnoses, treatment recommendations, or predictions.
Inputs → supported result
Bring what the task requires
One dated measurement set · two dated measurements · a preterm-birth timeline · or both biological parents’ adult heights
Get only the supported result
Percentiles, BMI screening context, arithmetic change, corrected-age timing, or family-height context—without inventing missing inputs
Illustrative workflow only—no child values or results are shown here.
The two growth-reference calculators keep one dated measurement set together and return only the WHO or CDC results supported by the measurements entered. Missing measurements are not invented.
Birth to before age 2
Enter weight, lying-down recumbent length, head circumference, or any combination. Weight plus length also produces weight-for-length; age is not the weight-for-length chart axis.
Have ready: birth date, measurement date, WHO sex chart, and the measurements you have
Calculate WHO baby growth percentilesAge 2 through 19
Enter standing height, weight, or both. The calculator returns height-for-age and/or weight-for-age; entering both also adds concise BMI-for-age context.
Have ready: birth date, measurement date, CDC sex chart, and standing height, weight, or both
Calculate CDC child growth percentilesBirth to before age 2
Use dated infant weight, recumbent length, and head-circumference records.
Age 2 through 19
Use dated standing height and weight records; both together also support BMI-for-age.
The reference and measurement method change at age 2. See the methodology for the exact boundary and measurement rules.
Different inputs · different calculation
These are not smaller versions of the Baby or Child Growth calculators. Each starts from a different input set, produces a different output, and has its own interpretation boundary.
The baby growth-reference workflow uses WHO Child Growth Standards through the day before the second birthday. The child growth-reference workflow uses CDC growth references from the second birthday through the day before age 20. Other calculators use their separately documented arithmetic or clinical-method references. The site does not silently substitute corrected age, mix standing height with recumbent length, or turn one point into a trend.
Result pages distinguish what you entered, what the calculator derived, which published reference or method was used, whether a technical measurement-review flag appeared, and which dataset and calculation version produced the result. Technical checks are not diagnoses, and source permission does not imply endorsement.