Abstract: The ceramic tile and marble wall-cut measuring ruler enables the tile or marble installer to properly measure the pieces of tile or marble which will be cut and installed between the wall and the previously installed tile or marble on the floor or wall. This device is a one piece ruler-like measuring device which will automatically deduct the size of the required grout-line measurement from the tile or marble to be cut, there-by saving installation time and product waste. The ceramic tile and marble wall-cut measuring ruler will be manufactured for specific size grout lines, of which the normal standards for grout lines are 1/4,1/2, and 3/4 inches in measurement.