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Handicap Index Formula:
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The Handicap Index is a measure of a golfer's potential ability based on their best recent scores. It allows golfers of different skill levels to compete fairly by adjusting scores based on their demonstrated ability.
The calculator uses the World Handicap System formula:
Where:
Explanation: The system takes your best 8 score differentials from your last 20 rounds, averages them, and applies a 0.96 multiplier to emphasize your potential ability rather than average performance.
Details: The Handicap Index provides a standardized measure of a golfer's ability that is portable across different courses and conditions. It enables fair competition and helps track improvement over time.
Tips: Enter at least 8 score differentials (one per line). The calculator will automatically select the best 8 (lowest) differentials and compute your Handicap Index according to WHS rules.
Q1: What is a Score Differential?
A: Score Differential measures your performance relative to the course difficulty. It's calculated as: (Adjusted Gross Score - Course Rating) × 113 / Slope Rating.
Q2: Why use the best 8 of last 20 scores?
A: This focuses on your demonstrated potential rather than average performance, providing a better measure of your current ability level.
Q3: What does the 0.96 multiplier do?
A: The "Bonus for Excellence" factor slightly reduces the handicap, encouraging improvement and ensuring handicaps represent potential rather than average ability.
Q4: How often should I update my handicap?
A: Handicaps should be updated after each acceptable round. Most systems update daily when new scores are posted.
Q5: What's the difference between Handicap Index and Course Handicap?
A: Handicap Index is your base ability measure. Course Handicap adjusts this for specific course difficulty: Course Handicap = Handicap Index × (Slope Rating / 113).