Child Height Predictor
Predict a child's adult height from the parents' heights.
Predicted adult height
179 cm
5'10"
Likely range (±8.5 cm)
171–188 cm
The mid-parental method
Average the parents' heights, then add 6.5 cm for boys or subtract 6.5 for girls — pediatrics' quick estimate of genetic height potential. About two-thirds of children land within ±8.5 cm of it; growth-chart tracking over time predicts far better than any formula.
Genes propose, environment disposes
Height is ~80% heritable, with nutrition and sleep supplying most of the rest — modern generations outgrew their grandparents on diet alone. A child consistently crossing percentile lines on their growth curve matters more than distance from any predicted number.
Frequently asked questions
- How does the Child Height Predictor work?
- Predict a child's adult height from the parents' heights.
- Is the Child Height Predictor free to use?
- Yes. The Child Height Predictor is completely free, runs entirely in your browser, and requires no account or sign-up. Your inputs never leave your device.
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