Understanding Course Rating™, Slope Rating™, and Adjusted Gross Score
Course Rating™, Slope Rating™, and Adjusted Gross Score (AGS) are the three core metrics used to measure golf course difficulty and fairly calculate a player's handicap.
Key Definitions- Course Rating™: The expected score for a scratch golfer on a given course under normal playing conditions.
- Slope Rating™: A measure of how much more difficult a course is for a bogey golfer compared to a scratch golfer. The Slope Rating scale ranges from 55 to 155, with 113 representing a course of standard (average) difficulty.
- Adjusted Gross Score (AGS): Your total score after applying maximum-score adjustments per hole — for example, capping each hole at a Net Double Bogey — to prevent unusually high scores from inflating your Handicap Index.
- Course Rating™ and Slope Rating™ are determined by authorized golf associations through official on-course evaluations that assess playing length and obstacles such as terrain, hazard placement, fairway width, and out-of-bounds areas, in accordance with World Handicap System (WHS) guidelines. Course Rating™ represents the scratch-golfer expectation; Slope Rating™ expresses the relative increase in difficulty for non-scratch (bogey) golfers versus scratch golfers.
- Course Rating™ provides a benchmark score representing the expected score of a scratch golfer on that course, establishing a standardized measure of difficulty for low-handicap players.
- Slope Rating™ describes how much more (or less) difficult a course plays for higher-handicap golfers compared to scratch golfers, providing a standardized measure of relative difficulty across all ability levels.
- Adjusted Gross Score reduces the impact of unusually high hole scores (for example by limiting a hole to Net Double Bogey), preventing extreme single-hole results from disproportionately inflating a player’s handicap or scoring record.
- Together, Course Rating™ and Slope Rating™ provide standardized, objective measures of course difficulty used to compare scores from different courses and to ensure fair competition across varying course challenges and player abilities.
- Using Adjusted Gross Score when recording rounds prevents outlier hole scores from skewing a player’s posted score or handicap, supporting fairer competition and more accurate handicap representation.
- Together, Course Rating™, Slope Rating™, and Adjusted Gross Score form the foundation of the World Handicap System (WHS), enabling golfers worldwide to compete on equal terms regardless of which course they play.