Abstract: A rafter layout tool for facilitating the layout of ridge cut, bird's mouth, seat cuts, fascia and soffit for the common hip, valley rafter cuts comprising a protractor member, measurement indicator arm and 90 degree arm and move up and down and side to side for different size lumber from 2?×6? to 2?×12? which is pivotally connected to the base of the protractor member, incorporating means for indicating pitch markings on said protractor. Extending linearly along the measurement indicator arm is a bounded slot providing means for slidably up and down and attaching the 90 degree arm ably to slide side to side and up and down for different size lumber.