A comprehensive welding gauge two or more of: a ruler, a weld height gauge, a protractor gauge, a Hi-Lo gauge, and a fillet height gauge, wherein each measurement device overlays a measurement scale on a main gauge plate and is riveted to the main gauge plate such that the measurement device may be extended beyond and retracted within the main gauge plate borders, either by sliding or rotating. The comprehensive gauge may thus be easily stored in and retrieved from a pocket by the user.