For each score posted a handicap differential is calculated. This is calculated by: Adjusted Gross Score 95.0 Less the course rating (71.5) Result 23.5
Multiply Result by standard slope of a golf course x 113 2655.5 Divide by the slope of the tees played 2655.5/130 Handicap Differential 20.4
Lowest 10 of the Last 20 Handicap Differentials
Scores Available = Scores to be used 5 or 6 = Lowest 1 7 or 8 = Lowest 2 9 or 10 = Lowest 3 11 or 12 = Lowest 4 13 or 14 = Lowest 5 15 or 16 = Lowest 6 17 = Lowest 7 18 = Lowest 8 19 = Lowest 9
Once your score file consists of 20 scores, your 10 lowest converted differentials are added together, multiplied by 96% and then divided by 10. That is your index. Your 10 lowest converted differentials are used, not necessarily the 10 lowest scores in your score file - Updated: August 11, 2005
