This child height predictor estimates a child’s likely adult height from the parents’ heights, using the mid-parental (target height) method. Enter both parents’ heights and the child’s sex above.
Formula (mid-parental)
Boy: (father + mother + 13 cm) ÷ 2 Girl: (father + mother − 13 cm) ÷ 2
Example
Father 180 cm, mother 165 cm, boy: (180 + 165 + 13) ÷ 2 = 179 cm (give or take ~8.5 cm).
This is an estimate; nutrition, health, and genetics all influence final height.
Important
This tool is for general educational purposes only and is not medical advice, diagnosis, or treatment. It does not replace evaluation by a qualified healthcare professional — consult one for any health decision. Last updated: August 2026.
Frequently Asked Questions
How do I predict a child’s adult height?
Average the parents’ heights and add 6.5 cm for a boy or subtract 6.5 cm for a girl (the mid-parental method).
How accurate is the mid-parental method?
It gives a target with a range of about plus or minus 8.5 cm; most children land within it.
What else affects adult height?
Nutrition, overall health, sleep, and genetics beyond the parents all play a role.