USGA Golf Handicaps  
     
  The USGA Golf Handicapping formula uses your LAST 20 rounds as the basic guideline to calculate a player's golf handicap. A factored number of those best rounds are used.  
     
  By definition, a USGA Golf Handicap Index is a USGA mark representing the potential ability of a player on a course of standard difficulty, as determined by the USGA. Potential ability is measured by a player's best scores, and is expressed as a number taken to one decimal place. These scores are identified by calculating the golf handicap differential for each score. The USGA Handicap Index is calculated by taking 96% of the average of the best handicap differentials, and applying USGA Rules Handicap Section 10-3 for golfers with two or more eligible tournament scores. A handicap differential is computed from four elements. Those are adjusted gross score, USGA Course Rating, USGA Course Slope Rating and 113 (the slope rating of a course of standard difficulty). To determine the handicap differential (Index), subtract the USGA Course Rating from the adjusted gross score; multiply the difference by 113; then divide the resulting number by the USGA Course Slope Rating. Round the final number to the nearest tenth. A factored golf handicap is reduced to the last whole number. As a formula...  
     
  Handicap Differential = ((Adjusted Gross Score - USGA Course Rating) x 113 / USGA Slope Rating).  
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