Abstract: A cutting guide to be removably attached to any one of a number of hand operated power cutting tools such as, for example, a circular saw for cutting a substantially planar workpiece. The cutting guide includes an L-shaped guide plate having first and second sets of channel ears affixed thereto. First and second position adjustable guide arms are slidable received through respective ones of the first and second sets of channel ears such that the guide arms are arranged in perpendicular alignment relative to one another. The first guide arm is selectively positioned to engage and travel along a side of the workpiece so that the cutting tool moves in a cutting path that is parallel to the side of the workpiece. The second guide arm extends to a point that is spaced from an end of the workpiece so as to move with the cutting tool towards and into engagement with the end of the workpiece to thereby limit the length of the cutting path to the distance from which the second guide arm is spaced from the workpiece.