Abstract: An adjustable marking gauge provides an x-y adjustment capability especially adapted to enable conventional drawer and cabinet hardware to be conveniently mounted. The marking gauge includes a body portion in the form of a rectangular block from which an adjustable slide arm projects. The slide arm has a J-shaped end portion and markings which enable distances from the midpoint of the block to be measured easily. An adjustable slide bar is connected to the block and is movable perpendicular relative to the slide arm. The slide bar includes preformed openings corresponding to the dimensions of conventional drawer and cabinet hardware.