Abstract: The present invention includes a rip cut measuring device that provides for the accurate measurement of flooring to ensure a proper fit, and is particularly useful when installing flooring in non-square rooms, or rooms with curved walls. The rip cut measuring device of the present invention includes a handle formed with a slide channel marked with offset gauge sized to slidably receive a pencil receiver. The receiver slides along the handle within the slide channel and can be secured in place at a particular offset gauge position corresponding to the width of the flooring being installed. The handle has a slider plate on one end of the handle having wheels to minimize marking and friction on the walls, and on the other end a radius end for use on curved wall surfaces.