Abstract: A spirit level is added to the clubhead of a golf club and observation of the bubble in the spirit level tells the golfer the slope of the green when the clubhead is positioned in bridging relation to a golf hole. A pair of indicia members are marked on the top wall of the clubhead on opposite ends of the clubhead so that the spirit level is between them and so that the bubble is exactly midway between them when the green is level. The indicia members are positioned directly above the peripheral edges of the hole when the golfer desires to read the slope of the green. In a preferred embodiment, the indicia members are arcuate to match the contour of the hole to facilitate their alignment with the hole. An opaque cover member is placed over the spirit level during regulation play. It is slideably mounted so that it may be retracted to expose the spirit level during practice sessions.