Estimate your child's future adult height using parents' height, current age, and current height. This tool provides both a predicted height and a realistic range based on growth patterns.
✔ Child height estimate • ✔ Adult height prediction • ✔ Parent height method • ✔ Free calculator
This calculator uses the mid-parental height formula, which is one of the most commonly used methods to estimate a child's future height. It combines the height of both parents and adjusts for gender differences.
However, we also include child age and current height to give a more realistic estimate based on growth progress. Children grow at different speeds, so this additional data improves accuracy compared to basic calculators.
The result includes a range (for example: 181 – 191 cm) instead of a single fixed number. This is because height prediction is not exact.
Even with the same parents, children can grow differently due to:
The range represents a realistic growth window, not an error. Most children will fall somewhere within this range.
If the father is 180 cm and the mother is 165 cm:
With real-life variation, this typically becomes a range of ±5 cm.
Genetics are the single biggest factor affecting adult height. Researchers estimate that around 60% to 80% of a person's final height is determined by inherited genes.
Children often resemble the height of their parents, grandparents, and other close relatives. However, genetics are complex, and it is common for a child to be noticeably taller or shorter than either parent.
This is why height prediction calculators provide an estimate rather than a guaranteed result.
Children do not grow at the same rate throughout their lives. Growth occurs in stages and can vary significantly between individuals.
| Age Range | Typical Growth Pattern |
|---|---|
| 0 - 2 Years | Very rapid growth during infancy. |
| 2 - 10 Years | Steady growth of approximately 5 to 7 cm per year. |
| 10 - 14 Years | Growth accelerates during puberty. |
| 14 - 18 Years | Growth gradually slows and eventually stops. |
| 18+ Years | Most people have reached adult height. |
Because every child develops differently, growth spurts may occur earlier or later than average.
Puberty plays a major role in determining final adult height.
Many children experience a rapid growth spurt during puberty when growth hormone levels increase significantly.
Because puberty timing varies, two children of the same age may have very different heights while still reaching similar adult heights.
Several factors can influence whether a child reaches, exceeds, or falls below their predicted height.
Most healthy children who receive proper nutrition, sleep, and healthcare will grow close to their genetic potential.
No calculator can accurately predict adult height with complete certainty.
Height prediction formulas are based on averages and population studies. They cannot account for every biological factor affecting growth.
For this reason, the prediction should be viewed as an estimate rather than a guaranteed outcome.
Is this height prediction accurate?
The calculator provides a realistic estimate based on parental height and growth patterns, but it cannot guarantee an exact final height.
What formula does the calculator use?
The prediction is based primarily on the widely used mid-parental height formula, combined with current age and height information.
Why include child age and current height?
These factors help place the child within their current stage of growth and improve the prediction compared to using parental height alone.
What is the typical margin of error?
Most predictions are accurate within approximately ±5 to 8 centimetres.
Can a child exceed the predicted range?
Yes. Genetics, nutrition, health, and puberty timing can all influence final height.
Do boys and girls grow differently?
Yes. Girls generally enter puberty earlier, while boys often continue growing for longer.
Can poor sleep affect growth?
Sleep is important because growth hormone is primarily released during deep sleep.
At what age do most people stop growing?
Most girls reach adult height between ages 14 and 16, while most boys stop growing between ages 16 and 18, although individual variation exists.
Health-related information is based on publicly available guidance and commonly accepted medical and health calculation methods.
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Last Updated: August 2026