What is the most accurate height predictor?

The most accurate height predictor is an equation in which you add the respective heights of the mother and father of a growing child, add an additional 5 inches for boys or subtract 5 inches for girls, and then divide the final sum by two, states MayoClinic.

The final height of a growing child often ends up within 4 inches of the estimation found with this equation, notes MayoClinic. A similar formula for predicting height is to measure a child's height when they are 18 months old and multiply it by two, adds MayoClinic. Though these two methods may offer decent approximations, there is no reliable way to accurately predict height.