Loading the page...
Preparing tools and content for you. This usually takes a second.
Preparing tools and content for you. This usually takes a second.
Fetching calculator categories and tools for this section.
How tall will your child be? Use the clinical Tanner-Davies formula to estimate your child's genetic height potential based on the heights of both biological parents.
Last updated: March 3, 2026
This tool calculates genetic potential. Factors like nutrition, general health, and hormonal imbalances can cause a child's actual height to diverge significantly from this target.
*95% of children will reach a final adult height within this 4-inch (10 cm) margin.
Note: The Tanner-Davies formula is a clinical estimate based strictly on genetics. Actual height can be influenced by nutrition, chronic illness, and environmental factors.
Your child's target height is a benchmark used alongside standard pediatric growth charts.
Doctors will plot the calculated Target Adult Height on a growth chart at age 18-20. They then look at your child's current height percentile. If a child is tracking along a percentile curve that leads directly to their calculated Target Height, their growth is considered genetically normal and healthy.
If a child's current growth trajectory is trending to finish far outside the 95% Confidence Interval (+/- 4 inches) of their Mid-Parental Target, it may prompt a pediatrician to investigate further for underlying nutritional, endocrine, or chronic health issues affecting growth.
Help your friends and family quickly estimate the genetic height potential of their little ones.
Suggested hashtags: #Parenting #Pediatrics #ChildGrowth #HealthTools