How a Golf Handicap Is Calculated (WHS)
The World Handicap System (WHS), adopted globally in 2020, calculates your handicap index using score differentials from your recent rounds. A score differential adjusts your gross score for the difficulty of the course you played, allowing golfers of different ability levels to compete fairly on any course.
The handicap index is not simply an average of your scores. The WHS is designed to reflect your potential — it uses your best recent differentials, not your average performance, so it rewards consistency and good rounds.
The Score Differential Formula
Each round produces a score differential calculated as:
- Score Differential = (Adjusted Gross Score − Course Rating) × (113 ÷ Slope Rating)
- Course Rating: the expected score for a scratch golfer on that course
- Slope Rating: the relative difficulty of a course for a bogey golfer vs a scratch golfer (113 is the standard)
How Many Differentials Are Used?
The WHS selects the lowest differentials from your most recent rounds. With 20 rounds, the 8 lowest are used. With fewer rounds, fewer differentials are used. The average of those lowest differentials is then multiplied by 0.96 to produce the Handicap Index.
Course Handicap vs Handicap Index
Your Handicap Index is a portable measure of your ability. Before a round, you convert it to a Course Handicap for the specific tees you are playing, using the formula:
- Course Handicap = Handicap Index × (Slope Rating ÷ 113) + (Course Rating − Par)
The Course Handicap is what you actually use on the scorecard. It adjusts your index for the length and difficulty of the specific tees you are playing that day.
Frequently Asked Questions
What is a good golf handicap?
Average recreational golfers typically have handicaps between 15 and 28. A single-digit handicap (under 10) indicates a skilled golfer. A scratch golfer (handicap 0) is expected to shoot at or below the course rating. The world's best professionals play to handicaps of +5 or better.
How often is my handicap index updated?
Under the WHS, handicap indexes are updated daily when scores are posted. In practice, most golfers see their handicap recalculated after each posted round. You need a minimum of 54 holes (typically 3 x 18-hole rounds) to establish an initial handicap index.
What is the maximum handicap index?
The WHS sets a maximum Handicap Index of 54.0 for all players, male and female. This replaced various national limits and ensures all golfers, regardless of ability, can obtain an official handicap.
