Estimate a child's adult height with the classic mid-parental method from both parents' heights — with an honest range around it.
All calculations happen entirely in your browser. Your family heights never leave your device.
For context only — these values are not used in the prediction formula.
General information only — not medical advice; consult a professional.
This tool uses the mid-parental method — the classic child-from-parents height estimate used in growth clinics — and it is honest about being a family average with a wide band around it.
The mid-parental method is a rough family average, not a measurement. The ±8.5 cm band around the estimate is wide on purpose — it reflects how much siblings, nutrition, illness and timing of puberty can vary, and most children's adult height does land within a few inches of this kind of estimate. Published methods tuned on large datasets (like Khamis-Roche) can narrow the uncertainty somewhat, but nothing predicts an individual child precisely.
No. This method only makes sense for a child whose final height is still ahead of them, and it requires the two parents' heights. If you are already grown, height is fixed — a calculator like a shoe-to-height estimator is guesswork by comparison, and growth plates have closed regardless.
No product you can buy makes bones grow longer. What can genuinely harm the outcome is medication that speeds up puberty — including anabolic steroids — because it closes the growth plates earlier and can lower adult height. Anything you are considering for a child should go through a pediatric endocrinologist first.
No. This is general information, not a diagnosis or growth assessment. Concerns about a child's growth — falling off their own percentile line, or very early or late puberty — are conversations for a pediatrician, who can plot growth charts and, if needed, order a bone-age X-ray.
No. The whole calculator is a few lines of vanilla JavaScript running in your browser. Your family's heights never leave your device — there is no account, no tracking and no network request attached to a calculation.
If you just finished with Height Predictor, the natural next steps are Dog Age Calculator, Chinese Zodiac Calculator, Sleep Cycle Calculator, or browse every tool in Health Tools.