Child Height Predictor
Child Height Predictor estimates how tall a child may grow as an adult using the mid-parental method, and shows the typical range around that estimate.
Last updated: July 2026
A child height predictor estimates a child's adult height from the parents' heights using the mid-parental method: average the parents' heights and add or subtract about 6.5 cm depending on the child's sex.
How to use Child Height Predictor
- Enter the mother's and father's heights.
- Select the child's sex.
- Read the predicted adult height and typical range.
Frequently asked questions
How does the mid-parental method work?
Average both parents' heights, then add 6.5 cm for a boy or subtract 6.5 cm for a girl. Actual adult height usually falls within about ±8.5 cm.
How accurate is it?
It's a rough genetic estimate. Nutrition, health and growth patterns also influence final height.
Is my data private?
Yes — all calculations run in your browser.
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