About the Height Growth Calculator
What is this?
Children grow at different rates, and predicting adult height has long fascinated parents and paediatricians alike. This calculator uses the mid-parental height method, a well-established genetic prediction tool that estimates a child's eventual adult height based on the heights of both parents. It provides a target range rather than a precise figure, since nutrition, health, and hormones all influence final height.
How it is calculated
For boys, the predicted adult height is calculated as (father's height + mother's height + 13 cm) ÷ 2. For girls, it is (father's height + mother's height − 13 cm) ÷ 2. The result typically falls within ±8.5 cm of the actual adult height, giving a realistic range rather than a single number.
Reference ranges
Frequently asked questions
How accurate is the mid-parental height method?
It predicts adult height within about 8–10 cm for roughly 80% of children. Environmental factors like nutrition and childhood health can shift the outcome outside this range.
Can nutrition increase my child's adult height?
Adequate nutrition, sleep, and regular exercise help a child reach their genetic potential, but they cannot extend it beyond what genetics allow. Severe malnutrition, however, can stunt growth.
When should I worry about my child's growth?
If your child consistently falls below the 3rd percentile or drops two percentile lines on a growth chart, consult a paediatrician to rule out underlying conditions.
Height Growth Estimator
Estimate a child's adult height based on CDC/WHO median growth data. Enter age, sex, and current height.