Child Height Percentile Calculator
Height Percentile by Age
Calculate your child's height percentile relative to CDC reference data for ages 2-18.
years
Formula
Z-Score = (Height - Median_height_for_age_sex) / SD. Percentile = Φ(Z-Score) × 100, where Φ is the standard normal CDF. Based on CDC growth reference data.
Frequently Asked Questions
What growth charts does this calculator use?
This calculator uses approximate CDC (Centers for Disease Control and Prevention) growth reference data for children ages 2-18 years. The CDC charts are recommended for children over 2 years old in the United States.
When should short stature be evaluated?
A child below the 3rd percentile for height, or one who is crossing percentile lines downward, should be evaluated by a pediatrician or pediatric endocrinologist. Growth hormone deficiency, thyroid problems, and other conditions can cause short stature.
Can this calculator predict adult height?
This provides a rough estimate of adult height based on current height relative to the median. More accurate methods include bone age X-rays and the mid-parental height method. Puberty timing significantly affects final adult height.