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Handicap Index Formula:
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The Handicap Index (HI) is a measure of a golfer's potential ability in the World Handicap System. It represents the number of strokes a player receives to adjust their score to the level of a scratch golfer.
The calculator uses the official WHS formula:
Where:
Explanation: The formula takes the average of your best 8 score differentials from your most recent 20 rounds and applies a 0.96 multiplier to encourage improvement.
Details: The Handicap Index allows golfers of different abilities to compete fairly. It's used worldwide under the World Handicap System and is essential for tournament play and friendly competitions.
Tips: Enter at least 8 score differentials (one per line). The calculator will automatically select your best 8 scores and apply the 0.96 multiplier. Score differentials should be calculated using the official WHS formula considering course rating and slope.
Q1: What is a Score Differential?
A: A Score Differential measures your performance relative to the course difficulty. It's calculated as: (113 ÷ Slope Rating) × (Adjusted Gross Score - Course Rating - PCC adjustment).
Q2: Why use the best 8 of last 20 rounds?
A: This system provides a consistent measure of your potential ability by focusing on your best performances while allowing for occasional poor rounds.
Q3: What does the 0.96 multiplier do?
A: The "Bonus for Excellence" multiplier slightly reduces your handicap index, encouraging continued improvement and ensuring handicaps represent potential rather than average ability.
Q4: How often should I update my handicap?
A: Handicaps should be updated after every acceptable round. Most golf associations provide daily handicap revisions through their systems.
Q5: What's the difference between Handicap Index and Course Handicap?
A: Handicap Index is your potential ability. Course Handicap is the actual number of strokes you receive on a specific course, calculated as: Handicap Index × (Slope Rating ÷ 113).