Calculate your official World Handicap System index instantly. UK's most accurate WHS handicap calculator with course rating and slope rating support.
Our golf handicap calculator follows the exact World Handicap System (WHS) rules implemented by R&A and USGA. Calculate your handicap index using up to 20 scores with automatic score differential calculations, course rating adjustments, and slope rating considerations.
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The World Handicap System (WHS) is the unified global handicap system adopted by golf governing bodies worldwide, including the R&A, USGA, Golf Australia, and European Golf Association (EGA). Our free golf handicap calculator implements the exact WHS algorithm used by official handicap services.
Course Rating represents the expected score for a scratch golfer (0 handicap) playing the course under normal conditions. This rating accounts for course length, obstacles, and playing difficulty.
Example: A course rating of 72.1 means a scratch golfer should average 72.1 strokes.
Slope Rating measures the relative difficulty for bogey golfers compared to scratch golfers. Ratings range from 55-155, with 113 being standard difficulty.
Higher slope = more challenging for higher handicap players.
✓ 100% WHS Compliant: Follows exact R&A and USGA specifications
✓ Accurate Calculations: Same algorithm used by official handicap services
✓ Track Progress: Store up to 20 rounds with score history
✓ Free Forever: No registration or payment required
✓ Mobile Friendly: Calculate on any device, anywhere
✓ Instant Results: Real-time handicap index updates
Official Handicap Note: While this calculator provides accurate WHS calculations, for official tournament play and club competitions, ensure your handicap is registered through an authorized golf club affiliated with your national golf governing body (England Golf, Golf Scotland, etc.).