ganak.appHeight Calculator
Predict your child's adult height using 3 scientific methods (Khamis-Roche, Mid-Parental, CDC multiplier). Check height percentile against CDC standards for any age and gender. Convert between cm, feet & inches, meters, and inches. Includes method comparison with confidence intervals, growth remaining, and percentile visualization.
6′2.5″
Range: 183.3 – 195.3 cm
Height Percentile
vs. CDC population standards
Method Comparison
3 independent scientific prediction methods
Averages both parents' heights with a sex-based adjustment. Simple and widely used in clinical settings.
Applicable: Any age
Uses child's height, weight, and parents' height with age-specific regression coefficients. Most accurate for ages 4–9.
Applicable: 4–17 years
Uses CDC growth chart multipliers to project adult height from current height. Does not require parental data.
Applicable: 1–17 years
How Height Prediction Works
Three scientific methods for estimating adult height
Height prediction uses a combination of genetics, current growth data, and statistical models to estimate a child's adult height. Research shows that genetics accounts for approximately 60–80% of adult height, with nutrition, sleep, physical activity, and health making up the rest.
Mid-Parental
Averages both parents' heights with a sex-based offset. Simplest clinical method. Works at any age.
Khamis-Roche
Regression model using child's height, weight, and parents' heights with age-specific coefficients.
CDC Multiplier
Projects adult height from current height using CDC growth chart multipliers. No parental data needed.
Understanding Height Percentiles
What percentile means and how to interpret growth charts
A height percentile tells you what percentage of the population is shorter than a given height for a specific age and gender. For example, if a child is at the 75th percentile, they are taller than 75% of children their age and gender.
May warrant medical evaluation
Normal range, shorter side
Most children fall here
Normal range, taller side
May warrant medical evaluation
The CDC growth charts are based on data from U.S. children and are the standard reference for ages 2–20 in the United States. The WHO growth charts, based on international data, are recommended for children under 2. Both use the LMS (Lambda-Mu-Sigma) statistical method to define percentile curves.
Height Prediction Formulas
The mathematics behind each prediction method
Factors That Affect Height
What determines how tall you or your child will be
Genetics (60–80%)
Over 700 gene variants influence height. Tall parents are more likely to have tall children, but the specific combination of gene variants means siblings can vary significantly.
Nutrition
Adequate protein, calcium, vitamin D, and zinc during childhood are critical for reaching genetic height potential. Malnutrition can reduce adult height by 5–10 cm.
Sleep
Growth hormone is primarily released during deep sleep. Children who consistently get adequate sleep (10–13 hours for young children, 8–10 for teens) optimize growth.
Physical Activity
Regular exercise stimulates growth hormone release and strengthens bones. Weight-bearing activities like running, jumping, and sports are particularly beneficial.
When Does Growth Stop?
Girls typically stop growing between ages 14–16 (about 2 years after first menstruation), while boys continue growing until ages 16–18, with some growing until 20. Growth plates (epiphyseal plates) in the long bones gradually fuse during puberty, marking the end of height increase.
Frequently Asked Questions
Common questions about height prediction, percentiles, and growth