Golf Handicap Calculator
Enter a few recent rounds and this works out your Handicap Index the same way the World Handicap System does — the average of your best score differentials. You need at least 3 rounds to get a number.
How the calculation works
For each round, the World Handicap System turns your score into a Score Differential:
Differential = (113 ÷ Slope) × (Score − Course Rating)
Your Handicap Index is then the average of your best differentials. Once you have 20 rounds on record it uses your best 8. With fewer rounds it uses a sliding scale — fewer of your best scores, plus a small adjustment — so you can still get a fair provisional number from as few as three.
Course rating and slope are printed on the scorecard or the tee markers. Course rating is the difficulty for a scratch golfer; slope (55–155, average 113) is how much harder it plays for everyone else.
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