A fourth method, called the Khamis-Roche Method, of predicting a child's height is multiplied by the corresponding measurement, and then added together with the constant to generate a formula to predict a child's height. Formula: Father's height : Y (in inches) Mother's height : X (in inches) Child's height : ch Child's Weight : cw Child's Age : ca Average Parent Height : APH Coef. of Current Height : H Coef. of Current Weight : W A child's height ((Y + X) / 2) x Coef. 0f APH + ( ch x coef of current height) + ( cw x coef Current weight) + constant Note : i This method is for children ages 4 and above 0 A table of coefcients must be obtained