Health & Fitness
Golf Handicap Calculator | USGA Handicap Index & Course Handicap
Calculate your official USGA Handicap Index from up to 20 recent scorecards. Enter gross score, course rating, and slope for each round to get handicap differentials, your index, and the resulting course handicap for any rated course. Supports 9-hole adjustments.
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Score History (3 rounds)
Round #1
Round #2
Round #3
Next Course (for Course & Playing Handicap)
World Handicap System (WHS) Explained
The WHS, adopted globally in 2020, unified six previously separate handicap systems into one. The Handicap Index measures a player's demonstrated ability on any golf course worldwide and is calculated from your best score differentials, adjusted by a 0.96 "playing conditions" multiplier.
Score Differential Formula
Differential = (Gross Score − Course Rating) × 113 ÷ Slope Rating
A course rating of 72.1 means an expert player would shoot approximately 72.1 on that course in normal conditions. A slope of 113 is the baseline — higher slopes indicate harder courses for bogey golfers relative to scratch golfers.
How Many Rounds Are Used?
| Rounds Available | Differentials Used |
|---|---|
| 3–6 | 1 best |
| 7–8 | 2 best |
| 9–11 | 3 best |
| 12–14 | 4 best |
| 15–16 | 5 best |
| 17–18 | 6 best |
| 19–20 | 8 best (maximum) |
Official Handicap: For an official USGA or WHS handicap, you must be a member of a registered golf club and post all rounds through the official GHIN system. This calculator provides an unofficial estimate based on the same mathematical method.
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