Height Calculator – Best Child Height Predictor Calculator

Height Calculator – Best Child Height Predictor Calculator for Endocrinology. This is a target midpoint, not the child's measured height or a guaranteed eventual outcome. Serial measurements, growth velocity, health and pubertal timing provide information absent from a parental-height sum. The catalogue phrase 'Best Child Height Predictor' is not a supported superiority claim.

For shared guidance on choosing a tool and documenting results, read the clinical calculator workflow.

How this calculator works

The conventional mid-parental target is (father height + mother height + 13 cm) / 2 for the boy formula, or (father height + mother height - 13 cm) / 2 for the girl formula. Inch entries are converted with exactly 2.54 cm per inch before calculation.

When to use this calculator

Use as a family-height midpoint when discussing growth. Prefer measured adult parental heights when available. The equation's sex convention describes the historical growth reference, not gender identity, and may need individualized interpretation in atypical growth or pubertal circumstances.

Inputs used

  • Biological parents' adult heights in cm or inches
  • The boy or girl growth-reference equation convention

Clinical interpretation

This is a target midpoint, not the child's measured height or a guaranteed eventual outcome. Serial measurements, growth velocity, health and pubertal timing provide information absent from a parental-height sum. The catalogue phrase 'Best Child Height Predictor' is not a supported superiority claim.

Worked example

For parental heights of 180 and 165 cm, the boy-formula midpoint is 179.0 cm and the girl-formula midpoint is 166.0 cm. The first result is 70.47 inches. Exchanging the two parental height entries leaves the midpoint unchanged.

Limitations and safety notes

No bone age, current child height, pubertal stage or disease-specific growth model is included. A universal individual prediction interval is not supplied. Missing parental information cannot be replaced with invented averages without changing the meaning of the estimate.

Frequently asked questions

Does the result guarantee adult height?

No. It gives a conventional family target midpoint.

Are the two height pages different prediction methods?

No. Both use this same mid-parental calculation, not separate validated predictors.

References

  • Primary 2017 EHR implementation study: mid-parental +/-13 cm convention and parent-height ascertainment; no universal individual prediction interval inferred. https://pmc.ncbi.nlm.nih.gov/articles/PMC5576174/

Editorial review and citation methodology

Maintained by the Quick Medical Calculator Editorial Team. Content record date: September 9, 2026. A content date is not evidence of independent clinical review. Individual clinical sign-off is not recorded on this page.

  • Prefer original validation studies for scoring systems and prediction tools.
  • Use current specialty society guidance, transplant allocation policy, public health guidance, or regulator resources when they govern clinical use.
  • Include limitations and safety notes when a calculator is population-specific, context-dependent, or unsuitable as a standalone decision tool.

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