Child Height Predictor
Use the Child Height Predictor to work through child Height Predictor from the values you enter. Review the notes below the result so you understand what the figure represents.
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 rangeHow to use the Child Height Predictor
Enter the requested values and start with one realistic example. Read the result together with its unit or label, then change one input at a time if you want to compare options.
This is a general estimate and cannot replace advice from a qualified health professional.
Frequently 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.