A thoughtful look at potential adult height.
Use parental heights to calculate a broad, formula-based estimate. The result is educational—not a diagnosis or a promise of future growth.
Enter parental heights
Choose one unit system for both measurements.
175.4 cm
Genetics, health, nutrition, hormones and the timing of puberty can all influence adult height. A clinician can interpret a child’s individual growth pattern.
What this predictor can—and cannot—tell you
The mid-parental height method uses the heights of two biological parents to produce a central estimate. It is often used as a quick reference point, not as a precise forecast. Children from the same family can reach different adult heights, and an individual result may fall outside the displayed range.
The formulas used
(parent 1 + parent 2 + 13 cm) ÷ 2(parent 1 + parent 2 − 13 cm) ÷ 2The displayed reference range extends approximately 10 cm (about 4 inches) on either side of the central estimate. This is a simplified educational presentation and should not be interpreted as a clinical interval.
How to measure height consistently
- Remove shoes and bulky hair accessories.
- Stand on a hard, level floor with the back against a flat wall.
- Look straight ahead, keeping the measuring book level.
- Mark the wall at the top of the head and measure from the floor.
- Measure both parents with the same method where possible.
Why actual adult height may differ
Parental height is only part of the picture. Many genes contribute to stature, while overall health, nutrition, sleep, endocrine conditions, long-term illness and puberty timing may also affect growth. A healthcare professional may consider serial measurements and an age-appropriate growth chart rather than a single calculator result.
Frequently asked questions
Is the child height predictor medically accurate?
It applies a recognized rule-of-thumb formula correctly, but the result is only a broad estimate. It cannot assess an individual child’s health or predict adult height with certainty.
Why does the calculator ask which formula to use?
The traditional mid-parental method applies a 13 cm adjustment in opposite directions for boys and girls. These labels describe the conventional formulas and do not capture every individual biological variation.
What if only one parent’s height is known?
This particular method requires two parental measurements. Substituting an average can make the result less personal and potentially misleading, so the calculator does not offer that option.
At what age does growth stop?
There is no single age for everyone. Growth usually slows after puberty, and timing varies considerably. A clinician can offer individual guidance when needed.
Does DigitalTall save the information entered?
No. The calculation runs locally in your browser and the parental measurements are not sent to DigitalTall.