Hip Roof GeometryEnter the wall plate size, pitch and overhang of an equal-pitch hip roof. Get the true hip rafter length, the backing angle, every jack rafter and the roof area, drawn on a live plan.

Every face has the same pitch, so the hips run at 45° in plan and the ridge is the length minus the width. A square plan gives a pyramid roof with no ridge. Jack rafters run from the eaves up to a hip; the list is for one face next to one hip, and every hip has the same set on both sides.