Predict a child's adult height from parents' heights and current height.
The midparental formula averages the two parents' heights, adding thirteen centimeters for boys and subtracting it for girls. A second estimate projects the current height forward using typical age-to-final-height percentages, and the two are averaged for a balanced prediction. Children tend to grow toward the average of their parents' heights, so this rough prediction helps families separate typical growth variation from real concerns.
Child Height Estimate
Boy adult height = (father + mother + 13) / 2; girl = (father + mother - 13) / 2; cross-checked against height at age
Height prediction is an estimate only; nutrition, health and genetics cause wide individual variation.
Boy adult height = (father + mother + 13) / 2; girl = (father + mother - 13) / 2; cross-checked against height at age The midparental formula averages the two parents' heights, adding thirteen centimeters for boys and subtracting it for girls. A second estimate projects the current height forward using typical age-to-final-height percentages, and the two are averaged for a balanced prediction.
Children tend to grow toward the average of their parents' heights, so this rough prediction helps families separate typical growth variation from real concerns.
This calculator takes 5 inputs: Gender, Child age (years), Current height (cm), Father's height (cm), Mother's height (cm). The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.