Child's Estimated Adult Height Calculator

Curious about how tall your child will be when he grows up? A child’s adult height is determined by many things, including inherited factors, gender, nutrition, and health status during childhood. Although a child’s adult height cannot be predicted with absolute certainty, a number of methods are available for estimating how tall a child will grow to be. One method requires a bone age X-ray. Another method, the Khamis-Roche method used in this calculator, is based on a child’s gender, height, and weight and the height of both parents.

This calculator is not intended as a substitute for professional health care. Always consult with a health care provider for advice concerning your child’s health.

Enter Your Information

Child's age:

Child's gender: Boy Girl

Child's ethnic group:

Child's weight: lbs.

Child's height: feet inches

Father's height: feet inches

Mother's height: feet inches

Your Results

Based on the information you provided, the child's predicted adult height is ' ".

What is the Khamis-Roche method?

Dr. Khamis and Dr. Roche, working at Wright State University, did a study of white American children that resulted in a formula for predicting a child’s adult height. The formula uses a child's current age, height, and weight and the average of the child's parents' heights. Their study was published in 1994 in Pediatrics. The Khamis-Roche formula has been studied only in white American children and is only an estimation of a child's adult height. If a child has underlying health problems, including a syndrome that might affect growth (Down syndrome, Prader-Willi syndrome, Laurence-Moon syndrome, Bardet-Biedl syndrome, Turner syndrome, and certain other genetic conditions), this calculation will be unreliable.

Reference
Khamis HJ, Roche AF. "Predicting adult stature without using skeletal age: the Khamis-Roche method." Pediatrics. Vol. 94. Oct. 1994:504-7.

This calculator is not intended to replace the evaluation of a healthcare professional.