Golf Handicap Calculator (WHS Method)
Enter your most recent scores (3 to 20 rounds). The calculator applies the World Handicap System approach for selecting the correct number of lowest score differentials and calculating your estimated Handicap Index.
Optional: Convert Handicap Index to Course Handicap
How the calculation of golf handicap works
A golf handicap lets players of different skill levels compete on a fair basis. Instead of using raw scores only, the system adjusts for course difficulty and playing conditions. Your Handicap Index represents your demonstrated potential, not your average score.
Core terms you need to know
Adjusted Gross Score (AGS)
This is your score after applying maximum hole-score rules (such as net double bogey under WHS). AGS prevents one bad hole from distorting your handicap.
Course Rating and Slope Rating
- Course Rating: Difficulty for a scratch golfer (example: 72.1).
- Slope Rating: Relative difficulty for a bogey golfer vs. a scratch golfer (usually 55 to 155, with 113 as standard).
Playing Conditions Calculation (PCC)
PCC can adjust a round up or down based on weather/course conditions for that day. If you do not know PCC, enter 0 in the calculator.
Score Differential formula
For each round, calculate:
Score Differential = (113 / Slope Rating) × (Adjusted Gross Score − Course Rating − PCC)
Each differential is then rounded to one decimal.
How many differentials are used?
Under WHS, your Handicap Index is based on your lowest differentials, and the count depends on how many scores you have posted:
- 3 scores: lowest 1 differential, minus 2.0 adjustment
- 4 scores: lowest 1 differential, minus 1.0 adjustment
- 5 scores: lowest 1 differential
- 6 scores: average of lowest 2, minus 1.0 adjustment
- 7–8 scores: average of lowest 2
- 9–11 scores: average of lowest 3
- 12–14 scores: average of lowest 4
- 15–16 scores: average of lowest 5
- 17–18 scores: average of lowest 6
- 19 scores: average of lowest 7
- 20 scores: average of lowest 8
The final Handicap Index is rounded to one decimal place.
Simple example
Suppose you have 20 rounds and your lowest eight differentials are:
10.4, 11.1, 11.3, 11.5, 11.8, 12.0, 12.2, 12.6
The average is 11.6, so your Handicap Index is approximately 11.6.
Converting Handicap Index to Course Handicap
Your index is portable, but your Course Handicap changes by tee set. The common formula is:
Course Handicap = Handicap Index × (Slope Rating / 113) + (Course Rating − Par)
This value is usually rounded to the nearest whole number for play.
Common mistakes golfers make
- Using raw score instead of adjusted gross score.
- Mixing up Course Rating and Slope Rating.
- Forgetting to include PCC when applicable.
- Averaging all rounds instead of the required lowest differentials.
- Using old rounds rather than the most recent scores.
Final tips for accurate handicap tracking
Post your scores promptly, verify ratings from the correct tee markers, and keep your most recent rounds up to date. A well-maintained handicap is one of the best tools for fair competition, progress tracking, and setting realistic performance goals in golf.