Abstract: A shingle gauge comprising a gauge base, a first shingle engaging surface disposed adjacent to a first end of the gauge base, and a second shingle engaging surface disposed adjacent to a second end of the gauge base. A distance between the first and second shingle engaging surfaces can be adjusted by selectively locating an engaging member, such as a bolt, that retains the second shingle engaging surface, which may comprise a preferably round bolt head, within a selected aperture of a plurality of apertures in the gauge base. A nut can selectively lock the engaging member in position relative to a given aperture. The second end of the gauge base can be beveled to lift and separate shingles. Length incrementation can be disposed along a first side of the gauge base and the first shingle engaging surface can comprise a straight edge extending from only a second side of the gauge base. A plurality of aligning notches can be disposed on the gauge base in alignment with the plurality of apertures.