How to predict a child\’s future height? Formulas and methods for measuring a child\’s height. A child\’s height is related not only to genetic genes, but also to nutritional and environmental factors. So, how to predict the future height of a child? There are some formulas and methods that can predict a child\’s future height more accurately. First, let’s introduce the formula for calculating a child’s height. This formula is one of the more commonly used ones at present: Predicted height (male) = (father’s height + mother’s height) ÷ 2 + 6.5cm Predicted height (female) = (father’s height + mother