Child Adult-Height Predictor (Mid-Parental)
The Tanner mid-parental method paediatricians use for a first estimate — with its honest ±8.5 cm window.
Mid-parental height is a genetic target estimate, and the ±8.5 cm window is the published 95% range — genuinely wide, because nutrition, sleep, puberty timing and chance all matter. Paediatricians track a child's own growth-curve percentile over time, which predicts far better than any parental formula; concerns about growth belong with your paediatrician.
Formula
For general information only. Pregnancy and infant care decisions must be guided by your treating clinician or midwife — always defer to their assessment.
The Tanner mid-parental method paediatricians use for a first estimate — with its honest ±8.5 cm window. The Child Adult-Height Predictor (Mid-Parental) is a free, private child height predictor tool — every result computes instantly in your browser with no sign-up and no data upload.
About Child Adult-Height Predictor (Mid-Parental)
Mid-parental height is a genetic target estimate, and the ±8.5 cm window is the published 95% range — genuinely wide, because nutrition, sleep, puberty timing and chance all matter. It applies boys: (mother + father)/2 + 6.5 cm · girls: (mother + father)/2 − 6.5 cm. Use the Child Adult-Height Predictor (Mid-Parental) to get an instant, clearly-explained result with the working shown step by step — free, private and with the source method cited.
How to use Child Adult-Height Predictor (Mid-Parental)
- 1Enter your details in the Child Adult-Height Predictor (Mid-Parental) input fields above.
- 2The result updates instantly with the working and reference bands shown.
- 3Adjust any value to explore how it changes the outcome — it's free and unlimited.
Why use Child Adult-Height Predictor (Mid-Parental)?
- ✓Instant child height predictor result that recomputes as you type — no waiting, no page reloads
- ✓100% client-side: your health data never leaves your browser
- ✓Shows the actual formula and your numbers substituted in, so you can see exactly how the result is reached
- ✓Based on published, citable sources (Tanner JM et al., Arch Dis Child 1970 — standards for children's height expectations)
- ✓Free forever with no sign-up, account or app install
Frequently asked questions
How does the Child Adult-Height Predictor (Mid-Parental) work?+
Mid-parental height is a genetic target estimate, and the ±8.5 cm window is the published 95% range — genuinely wide, because nutrition, sleep, puberty timing and chance all matter. The calculation uses the formula: boys: (mother + father)/2 + 6.5 cm · girls: (mother + father)/2 − 6.5 cm. Everything runs instantly in your browser as you type — your inputs are never uploaded.
Is the Child Adult-Height Predictor (Mid-Parental) accurate, and what is it based on?+
The method is traceable to authoritative sources: Tanner JM et al., Arch Dis Child 1970 — standards for children's height expectations. Results are estimates — individual variation always applies, so treat the output as a well-grounded starting point.
Is the Child Adult-Height Predictor (Mid-Parental) free and private?+
Yes. It's completely free with no sign-up, and all computation happens locally in your browser, so none of your health data ever leaves your device.
Can I use this for medical decisions?+
This tool is informational only. Always defer to your treating clinician or midwife for pregnancy and infant care decisions.
What can I use the Child Adult-Height Predictor (Mid-Parental) for?+
It's commonly used for child height predictor, mid parental height, how tall will my child be. The Tanner mid-parental method paediatricians use for a first estimate — with its honest ±8.5 cm window.
Related Health tools
Adult BMI Calculator (WHO)
Body-mass index for adults with the WHO reference bands shown neutrally, plus the substituted formula step by step.
● LiveBMI Calculator (lb & inches)
US-style BMI from pounds and inches using the ×703 conversion, with CDC adult reference ranges.
● LiveBMI Calculator for Women
BMI with reference context written for women — what the index can and cannot say about female body composition.
● Live