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The mid-parental height method is a widely used pediatric estimate for a child's likely adult height, based only on both parents' heights.
This calculator applies that formula to estimate a child's predicted adult height and its typical range.
How it works
Enter both parents' heights in centimeters and the child's sex. The calculator averages the parents' heights, adds or subtracts 13 cm depending on sex, and reports a typical ±8.5 cm range around the estimate.
- Enter father's height (cm).
- Enter mother's height (cm).
- Enter child's sex.
- Click Calculate to see your results.
Examples
Father 180 cm, mother 165 cm, son
For a son with a 180 cm father and 165 cm mother, predicted adult height is about 179 cm, typically ranging from 170.5–187.5 cm.
Who should use it
- Satisfying curiosity about a child's likely adult height.
- General reference for pediatric growth discussions (not a substitute for medical growth charts).
Industry applications
- Pediatrics and child growth tracking
- General health and parenting reference
Advantages
- Uses the well-established, widely cited mid-parental height method.
- Reports a realistic range alongside the point estimate.
Limitations
- Doesn't account for nutrition, health conditions, or individual growth variation.
Common mistakes to avoid
- Entering height in inches or feet instead of centimeters.
- Treating the estimate as a precise prediction rather than a statistical range.
Best practices
- Use the ±8.5 cm range, not just the single predicted number, to set realistic expectations.
Tips
- For a more clinically rigorous estimate, a pediatrician can plot a child's growth on standardized percentile charts over time, which tends to be more predictive than a single parental-height formula.