Method
Boy midpoint=(father+mother+13 cm)/2; girl midpoint=(father+mother−13 cm)/2; approximate family target interval is midpoint ±10.2 cm.
Everyday worksheet
Family-Based Target Height Calculator
Estimate a broad mid-parental adult-height range for a child and compare the midpoint with both parental heights.
The calculation runs locally. Results include the intermediate values, unit conversions and assumptions needed to audit the answer.
Method, assumptions and practical use
How the Family-Based Target Height Calculator works
Boy midpoint=(father+mother+13 cm)/2; girl midpoint=(father+mother−13 cm)/2; approximate family target interval is midpoint ±10.2 cm. Inputs stay in this browser, and the result table exposes conversions and assumptions for independent checking.
Interpret the result
The result is a family-based target range, not a deterministic prediction of an individual child's adult height.
Check the assumptions
Genetics, health, nutrition, puberty, population background and measurement error affect growth; concerns belong with a pediatric clinician.
Local calculation
Everything runs in this browser. Inputs are not sent to an external calculator.
Rounding
Displayed values may be rounded for readability while calculations use full floating-point precision unless the tool explicitly uses exact integers.
Scope
Genetics, health, nutrition, puberty, population background and measurement error affect growth; concerns belong with a pediatric clinician.
Simple by design
Three steps to a clearer number.
Enter your details
Use realistic values in each field. You can change them anytime.
Calculate instantly
The formula runs locally, so there is no account or waiting time.
Use the result
Treat the answer as a practical estimate for your next decision.