Runout due to eccentricity influences index@ pitch and profile inspection data for spur and helical and profile inspection data for spur and helical gears and tooth alignment inspection data for helical gears. This paper reviews the numerical procedure used with index and pitch data to determine the magnitude and direction of the runout. It re-plots the inspection data with runout influence removed. This new numerical procedure is effective in the presence of such tooth geometry features as slope variation (e.g.@ pressure angle variation in profile and helix angle variation in tooth alignment)@ non-linearity (e.g.@ tip relief in profile and crown in tooth alignment)@ and waviness. The numerical procedure is shown for index@ pitch and profile inspection data taken from a test gear (also see AGMA 93FTM6).