Child Height Percentile Calculator
Compare your child's height to WHO growth standards for ages 0 to 5 years. Get exact percentile, z-score, and growth band instantly.
What Is a Child Height Percentile?
A child height percentile shows how a child's length or height compares to a reference population of the same age and sex. A 50th percentile means half of peers are shorter and half are taller. This calculator uses WHO child growth standards for ages 0 to 5 years. Compare with the Child Weight Percentile Calculator and Child BMI Percentile Calculator.
How WHO Height Percentiles Work
WHO growth standards use z-scores from reference medians and spreads by age in months. The percentile is the cumulative normal distribution of that z-score. Pediatricians track whether a child follows a similar percentile canal over time rather than focusing on a single reading.
When to Consult a Pediatrician
A child who stays in a similar band may be healthy even at the 15th or 85th percentile. Crossing two or more percentile lines (for example from 75th-85th to 15th-25th) warrants medical review. For older children, see the Height Percentile Calculator for CDC-based ages 2 to 20+.
Frequently Asked Questions
Which ages does this calculator cover?
It covers children from birth through 60 months (5 years), using WHO length-for-age reference data by month.
Can I enter age in years?
Yes. Switch the age unit to years and enter values such as 4 or 4.5. The tool converts to months internally.
What is a normal height percentile?
Percentiles between about the 3rd and 97th can be normal when growth follows a consistent pattern. The 50th percentile is the population median, not a target height.
Should I use length or standing height?
For infants and toddlers, recumbent length is standard. After about age 2, standing height is often used clinically. Enter the measurement you have in centimeters.
How is the z-score calculated?
Z-score equals (measured height minus WHO median) divided by the reference standard deviation at that age and sex.
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