Golf Handicap Index Calculator

Estimate your golf Handicap Index from your sim or on-course rounds with the World Handicap System formula — enter your score, Course Rating and Slope.

Enter your recent rounds — from a simulator or the course — with the Adjusted Gross Score, Course Rating and Slope for each. The tool computes each round's Score Differential as (113 ÷ Slope) × (Adjusted Gross Score − Course Rating) and averages your lowest differentials per the World Handicap System, which needs at least three rounds. Every number comes from you: nothing is invented and Course Rating and Slope are never guessed.

This is an unofficial estimate for tracking your own progress. Under the World Handicap System, simulator scores are generally not acceptable for an official Handicap Index, which must come from a WHS-authorized club or association. Need more rounds? Find a simulator near you to play full rated courses in any weather.

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