RapidCheck

Child Height Predictor

Estimate a child's adult height from the parents' heights.

Last updated: 12 Aug 2026

Quick answer

The mid-parental method estimates adult height as (father's height + mother's height ± 13 cm) ÷ 2 — add 13 cm for a boy, subtract 13 cm for a girl. For example, a boy with a 175 cm father and 162 cm mother is predicted at about 175 cm. Enter the heights above.

Estimate a child's likely adult height using the mid-parental formula: (father + mother ± 13 cm) ÷ 2. It is an estimate — genetics, nutrition and health all play a part.

How to predict a child's adult height

  1. 1 Enter the father's and mother's height in cm.
  2. 2 Select the child's gender.
  3. 3 We apply the mid-parental formula to estimate adult height.

Frequently asked questions

How accurate is height prediction?
The mid-parental method gives a rough estimate (typically within a few cm); actual height depends on genetics, nutrition and health.
What is the formula?
(father's height + mother's height + 13) ÷ 2 for boys, and (…− 13) ÷ 2 for girls, in centimetres.
Can nutrition change height?
Yes — good nutrition and health during growth years help children reach their genetic potential.

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