Abstract: A golf putting aid is disclosed that includes a level detector for measuring a slope of a golf green and for generating an electrical signal representing the measured slope, a control circuit coupled to the slope measuring sensor for receiving the electrical signal and for generating an indicator signal representing information that will aid a golfer while making a putt on the golf green, and an indicator coupled to the control circuit for receiving the indicator signal and for indicating the information represented by the indicator signal to a golfer. Preferably, the level detector measures the slope of a golf green at at least two locations and generates electrical signals representing the measured slope at each location. The control circuit then processes the electrical signals to compute an offset distance from the hole at which the golfer should aim so as to compensate for the measured slopes of the green.