Child Height Predictor
Predict adult height from parents' heights
Use this when you need a fast, accurate result — no sign-up, works entirely in your browser.
Predicted adult height (cm)—
Predicted height (ft/in)—
Likely range (cm)—
Typical accuracy—
How to Use
- Enter your details into the fields above.
- Click the calculate button to get your result instantly.
- Use the clear button to start a new calculation.
Example
- Father 178 cm, mother 165 cm, boy → Predicted adult height ≈ 178.0 cm (5'10"), likely range 173–183 cm
- Doubling method: 88 cm at age 2 → Predicted adult height ≈ 176.0 cm (5'9"), likely range 168.5–183.5 cm
Formula
Two methods are offered. Mid-parental: (father + mother) / 2, then +6.5 cm for boys or −6.5 cm for girls, with a likely range of about ±5 cm. Doubling: a child's height at age 2 × 2, with a wider ±7.5 cm range. Both are rough estimates — nutrition, sleep, and health also play large roles, and the doubling method is less reliable than the mid-parental one.
About Child Height Predictor
Predict adult height from parents' heights. This free online tool gives you fast, accurate results without registration or downloads.
Everything runs locally in your browser, so your data is never uploaded or stored — privacy first.
Frequently Asked Questions
Is this tool free to use? +
Yes, it is completely free with no registration or download required.
Is my data private? +
Yes. Everything is processed locally in your browser. Nothing is uploaded or stored on our servers.
Does it work on mobile? +
Yes, it works on any device — phone, tablet, or desktop.