Child Height Predictor
Predict a child's adult height from the parents' heights using the mid-parental method pediatricians use.
Predicted adult height
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Likely range (±8.5 cm) —
In feet & inches —
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How it works
Boys: (mother + father + 13 cm) ÷ 2; girls: (mother + father − 13 cm) ÷ 2; ±8.5 cm rangeFrequently Asked Questions
How accurate is the mid-parental height method?
It lands within ±8.5 cm (about 3.5 in) for roughly 95% of children — genetics sets the range, while nutrition and health determine where in it a child lands.
Can I predict height from a toddler's size?
A rough alternative doubles a child's height at age 2 (boys) or 18 months (girls). Pediatricians combine that with growth-curve tracking and the mid-parental target.
Do children always end up between their parents' heights?
Usually near the adjusted average, but not always inside it — the ±8.5 cm range means a child can end up taller or shorter than both parents.