Mid-parental height calculator for boys and girls (cm, in)
Estimate your child's adult height from both parents' heights with the mid-parental height formula. See the formula, a worked example and the typical range.
How accurate is the mid-parental height formula?
It is a rough estimate. Many children fall near the predicted value, but real outcomes can differ.
Why is there a different formula for boys and girls?
The standard MPH method adjusts by 13 cm to account for average sex differences in adult height.
Does nutrition affect final height?
Yes. Nutrition, health, and overall environment can influence growth outcomes.
Can exercise or sports increase height?
Active play supports growth in general, but it does not “add” extra height beyond genetic potential.
At what age does growth stop?
It varies. Many girls stop earlier than boys, but the exact timing differs person to person.
What if my child’s projected height seems very low or high?
Treat it as an estimate. If it looks extreme or if growth is slowing unexpectedly, consider a pediatrician check.
Is this calculator valid for all populations?
It is a general method. Accuracy can vary across individuals and populations.
Can I use feet and inches?
Yes, in part. Switch the units to inches and enter each height in total inches (for example, 5′ 9″ = 69 in). The result is shown in feet and inches, and in cm.