Handicap Index Calculator
Enter your recent rounds and we'll estimate your USGA Handicap Index. The system uses the lowest 10 score differentials from your last 20 rounds, and you need at least 5 rounds for a first index.
Your recent rounds
9-hole rounds: enter as usual, two 9s count together
Your Handicap Index
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Enter at least 5 rounds to calculate an index
How it works: each round becomes a Score Differential —
(Adjusted Gross Score − Course Rating) × 113 ÷ Slope Rating.
Your index is the average of your lowest 10 differentials from your last 20 rounds, rounded to one decimal.