A little glimpse
into their future.
Estimate your child’s adult height, then follow every little milestone along the way.
How tall might they be?
Approximate range
A family-based estimate using the mid-parental method. This range is a rough guide, not a personal confidence interval or a growth forecast.
Understand this estimate Start a growth recordA little knowledge goes a long way.
Clear, practical guides to help you understand your child’s growth.
How accurate are height predictors?
Understand what a family-based adult-height estimate can tell you, why the range is broad, and how to read the result with care.
Read the guideThe mid-parental height formula
Work through the mid-parental height calculation in centimeters or inches, with an example and a clear explanation of the reference range.
Read the guideHow to measure height at home
Set up a simple home height measurement, avoid common recording mistakes, and keep a clear dated record of what you measured.
Read the guideA few things worth knowing.
Good questions deserve clear answers.
How accurate is this estimate?
It is a rough estimate based on biological parents’ heights. The American Academy of Pediatrics describes a margin of about 4 inches (10 cm) in either direction. Actual adult height can fall outside this range. Read about accuracy.
What if I don’t know a parent’s height?
This formula needs both biological parents’ heights. Avoid substituting an average or guessing: it can make the result misleading. You can still keep a growth record without this information.
Is my child’s information uploaded?
Prediction inputs and results are saved on our server. You can try two predictions as a guest, then sign in with Google to continue. Your growth journal stays on this device and does not sync to your account. Read our privacy policy.