Growth data sources and licenses
Download the reference numbers used in pediatric growth assessment, their original sources, and the applicable license.
WHO Child Growth Standards
Copyright holder: World Health Organization, as identified in the WHO anthro source repository (opens in a new tab). RDCalc adapted the numerical tables on September 21, 2026 by selecting calculation columns and the age range shown below, then converting them to JSON without rounding coefficients.
The reference-data adaptation is available under GNU GPL version 3. You may copy, modify, and redistribute this material under that license, including for commercial use. It is provided without warranty as described in the license. WHO has not endorsed RDCalc.
- Full GPL v3 license
- Notices and reproduction instructions
- Original authorship notice
- Source URLs and hashes
- Conversion script
Weight-for-age
Birth to 730 days; both sexes.
Length-for-age
Birth to 730 days; both sexes.
Weight-for-length
Recumbent length 45–110 cm; both sexes.
All downloads are available without an account or subscription. RDCalc’s service terms do not restrict rights granted by the data license.
CDC growth reference
Assessments from age 2 to less than 20 use CDC 2000 weight and stature data, with CDC 2022 extended BMI data above the 95th percentile. CDC attribution identifies the source and does not imply endorsement.