Adult Height Predictor
The Adult Height Predictor estimates a child's adult height from the child's sex and both parents' heights in centimeters using the mid-parental method, returning a predicted height and a likely range.
What this calculator does
The Adult Height Predictor estimates your result instantly from the values you enter, using standard health & fitness formulas. The Adult Height Predictor estimates a child's adult height from the child's sex and both parents' heights in centimeters using the mid-parental method, returning a predicted height and a likely range. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate rather than a certified or official figure.
Result
About Adult Height Predictor
The mid-parental method estimates a child's likely adult height from the heights of both parents, adjusted by sex. This tool applies that formula and adds a plus-or-minus range around the central estimate.
Enter whether the child is a boy or a girl and both parents' heights in centimeters to see the predicted height.
Formula & Mathematical Calculation
Predicted Height (cm) = f(Child Sex, Father Height (cm), Mother Height (cm))
Calculated according to standard health formulas implemented in the calculator core.
Calculation Example
For a boy with a father of 178 cm and a mother of 165 cm, the calculation adds 13 cm for a boy: (178 + 165 + 13) ÷ 2 = 356 ÷ 2 = 178.0 cm.
The likely range is the prediction plus or minus 8.5 cm, giving 169.5 to 186.5 cm.
Key Benefits
- Applies the widely used mid-parental height formula.
- Adjusts the estimate by 13 cm depending on whether the child is a boy or a girl.
- Returns a plus-or-minus 8.5 cm range around the central figure.
- Uses simple metric inputs of parent heights in centimeters.
How to Use this Calculator
-
Select child sex
Choose Boy or Girl from the Child Sex dropdown. -
Enter father height
Type the father's height in centimeters. -
Enter mother height
Type the mother's height in centimeters. -
Calculate and read
Select Calculate and read the Predicted Height and Likely Range values.
Assumptions & Limitations
What the calculation assumes
- Every value you enter is treated as an exact, known amount.
- Any rate or interval you enter is assumed to hold for the whole period unless the form asks for it separately.
- Results use standard published formulas and account only for the values entered above.
- Rounding is applied for display; the underlying calculation uses your full precision.
- Results are returned in the same units you enter, unless the tool states the output unit.
What it does not cover
- Adult Height Predictor produces a calculated result for reference and learning, not a certified or official measurement.
- Real-world outcomes differ when tolerances, rounding rules or local standards apply.
- Definitions and standards vary by region and change over time; verify the convention that applies to your case.
- Figures are only as accurate as the inputs you supply — check them before acting on the result.
- For work where the result carries real consequences, confirm it against an authoritative source.
Frequently Asked Questions
Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.