A gauge profile apparatus (100) includes a gauge profile system (104) and a lap count system (106) for determining an average three-dimensional profile over the length of a sheet coil (10). The gauge profile system (104) includes a lap profile measuring device (112) which will make a distance determination between top and bottom surfaces for the sheet coil (10). A second embodiment of a lap count system (600) is also provided, which utilizes a pair of reflectance lasers and a positioning system.