Height and Weight Percentile Calculator
Estimate height-for-age and weight-for-age percentiles from the CDC 2000 reference for children ages 2 through 19.
Written and checked by TheToolNet Editorial Team · Last reviewed: October 3, 2026 · Editorial method
Results may be wrong if dates or measurements are inaccurate, and one point cannot show a child's growth pattern. The CDC says growth charts contribute to an overall clinical impression and are not a sole diagnostic instrument. Ask a pediatrician or other qualified clinician to interpret measurements, especially after unexpected growth change, weight loss, feeding concerns, delayed development, or illness.
CDC 2000 U.S. stature-for-age and weight-for-age LMS tables, covering 24 to under 240 months. This is not an infant chart, BMI percentile, or adult height predictor.
Estimate child height and weight percentiles
What the percentile means
A percentile is a position within the reference distribution for children of the same age and chart sex category. A 60th percentile does not mean “60% healthy” or set an ideal target. Clinicians usually care more about accurate measurements over time and the child's broader health than one isolated rank.
CDC method used
The calculator uses the CDC's official growth-chart LMS data files. It interpolates L, M, and S parameters for exact age in months, calculates a z-score with the CDC Box-Cox equation, then converts that z-score to a standard-normal percentile. The reference tables are bundled locally; dates and measurements stay in your browser.
Measure before interpreting
- Measure standing height without shoes using a level head position and a flat wall or stadiometer.
- Use a calibrated scale on a hard surface and light clothing.
- Use the actual measurement date and date of birth.
- Take the result to a clinician if it is concerning; do not try to move a child toward a percentile without medical advice.
Important limits
This tool does not cover children under 2, does not calculate BMI-for-age, and does not account for medical history, puberty timing, genetics, prematurity, measurement conditions, or which reference is appropriate outside the United States. The CDC overview explains the intended role of growth charts.
Frequently asked questions
Is a low or high percentile automatically abnormal?
No. A clinician considers the child's trajectory, family pattern, health, development, and measurement quality. Do not diagnose from this number.
Why does the tool ask for sex category?
The CDC 2000 tables are published as separate male and female reference distributions. This is a limitation of the source data, not a statement about identity.
Can I use this for a baby?
No. Children under 2 require infant growth standards and recumbent-length methods, which are intentionally outside this page.