Wondering how tall your child will be? Enter both parents' heights and we'll estimate your child's adult height with the mid-parental height formula — shown in centimetres and feet/inches.
Estimate only. The mid-parental method predicts within roughly ±10 cm (±4 in); growth also depends on nutrition, health and many genes. Not medical advice — consult a paediatrician about growth concerns.
This is the method paediatricians use to estimate a child's genetic target height:
(mother + father + 13 cm) ÷ 2(mother + father − 13 cm) ÷ 2In inches, add or subtract 5 inches instead of 13 cm. The 13 cm reflects the average adult height difference between men and women.
The formula gives a midpoint. A child's real adult height usually lands within about ±10 cm (±4 in) of the estimate — roughly the 3rd to 97th percentile target range shown above.
It is a quick genetic estimate, not a guarantee.
That is why siblings with the same parents can end up different heights.
Most girls finish growing around age 14–15 and most boys around 16–17, once the pubertal growth spurt is complete. Growth plates then fuse and height stabilises.