there are a couple of ways to predict adult height for toddlers. the simplest way is to double the child's height at age 2. another trick is to look on a gender-appropriate growth chart for the child's height percentile at age 2 and then look at the height for that same percentile for age 18 years. lastly for boys you can add 5 inches to the mom's height and then average that number with the dad's height. for girls you have to subtract 5 inches from the dad's height and then average it with the mother's height.
can i predict my child's height?