CDC growth calculator 0 to 36 months
Calculate CDC infant chart percentiles for weight-for-age, recumbent length-for-age, and head circumference-for-age from birth through 36 months. This page is meant for workflows that explicitly need the CDC 0 to 36 month chart family.
Last reviewed: 2026-04-28
Chart selection matters
What this page calculates
The calculator uses CDC infant LMS data and the LMS z-score method to return a percentile for each entered measurement. You can enter one measurement or all three at the same visit.
- Weight-for-age uses weight in kilograms after unit conversion.
- Length-for-age uses recumbent length, not standing height.
- Head circumference uses the largest occipital-frontal circumference measurement.
CDC 0 to 36 month workflow
- Confirm sex, age in months, and whether the age is chronological or corrected.
- Recheck measurement technique before interpreting an unexpected percentile.
- Use the same chart source when comparing serial values.
- Document the percentile alongside trend direction and clinical context.
When to use another chart
For routine U.S. growth surveillance, many teams prefer WHO standards from birth to 24 months and CDC charts from 2 years onward. For preterm infants, use corrected age and neonatal growth guidance when appropriate.
- Weight percentile calculator for age-selected WHO/CDC weight output.
- Height percentile calculator for WHO length under 24 months and CDC stature after 24 months.
- Head circumference percentile calculator for WHO head circumference support.
- WHO growth calculator 0 to 24 months for routine infant WHO chart output.
- Adjusted age calculator for preterm age correction.
- CDC growth calculator 2 to 20 years after the CDC child chart transition.
Related calculators
References
FAQs
Yes. It uses CDC infant LMS data to calculate weight-for-age, recumbent length-for-age, and head-circumference-for-age percentiles for ages 0 to 36 months.
Many current U.S. workflows use WHO standards from birth to 24 months and CDC charts after age 2. This page is for chart-specific CDC 0 to 36 month workflows, historical chart comparisons, and records that explicitly require CDC infant charts.
Use corrected age only when your local neonatal or follow-up clinic workflow calls for it. Document whether the age is chronological or corrected so future trend review is consistent.
No. This page calculates weight-for-age, length-for-age, and head-circumference-for-age. Use a dedicated weight-for-length chart or EHR growth module when that specific measure is needed.
Document age in months, sex, measurement technique, measured value, percentile, z-score when needed, and chart source. Compare with prior points before acting on a single percentile.