Abstract: A mitering gauge is constructed from three legs of a triangle. Two of the legs have fixed lengths and the third leg is adjustable in length. One of the fixed length legs is formed as a sliding plate and the other fixed length leg is formed as a fence pivotally mounted on the plate for orienting a work piece with respect to a feed direction of a woodworking machine. The third leg is formed as a gauge bar having a plurality of holes spaced in predetermined positions along its length. Different holes in the gauge bar may be aligned with an anchor block mounted on the plate for adjusting the angular orientation of the fence to a number of frequently used mitering angles.