Golf Handicap Calculator
Estimate your Handicap Index from your recent rounds using the World Handicap System, and turn it into a Course Handicap for any tees.
Results
| Item | Value |
|---|
Score Differentials
| Round | Score | Differential | Used |
|---|
Quick Answer
A Score Differential is 113 ÷ Slope Rating × (adjusted score − Course Rating). Your Handicap Index is the average of your lowest 8 differentials from your last 20 rounds. With fewer than 20 rounds, a smaller number is used. For the 10 sample rounds above, the estimate is 15.6.
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Table of Contents
- Golf Handicap Calculator
- Quick Answer
- Related Calculators
- How This Golf Handicap Calculator Works
- How to Use the Golf Handicap Calculator
- Core Formulas
- Key Terms
- Worked Example
- Real-Life Examples
- Handicap Index vs Course Handicap
- Fewer Than 20 Scores
- Common Mistakes to Avoid
- Frequently Asked Questions
- References & Sources
How This Golf Handicap Calculator Works
Enter each round on its own line: your adjusted gross score, the Course Rating and the Slope Rating of the tees you played. The calculator works out a Score Differential for each round, picks the lowest ones according to the World Handicap System table, and averages them to estimate your Handicap Index. Add the Slope Rating, Course Rating and par of a course to see your Course Handicap there.
Quick explanation: your Handicap Index shows your potential, based on your better rounds.
- Score Differential: how well you played compared with the course difficulty.
- Handicap Index: the average of your best differentials.
- Course Handicap: the strokes you get on a particular set of tees.
How to Use the Golf Handicap Calculator
- Find the Course Rating and Slope Rating for the tees you played, on the scorecard or your association’s site.
- Enter each round as: score, Course Rating, Slope Rating, one round per line.
- Optionally, enter the Slope Rating, Course Rating and par of the tees you will play next.
- Press Calculate.
- Read your estimated Handicap Index, Course Handicap and which rounds were used.
Core Formulas
- Score Differential: (113 ÷ Slope Rating) × (adjusted gross score − Course Rating)
- Handicap Index: average of the lowest 8 of the last 20 differentials
- Course Handicap: Handicap Index × (Slope Rating ÷ 113) + (Course Rating − par)
113 is the Slope Rating of a course of standard difficulty. Official calculations can also include a Playing Conditions Calculation (PCC) adjustment.
Key Terms
- Handicap Index: a measure of a golfer’s demonstrated ability under the World Handicap System.
- Score Differential: a round’s score adjusted for the course’s difficulty.
- Course Rating: the expected score for a scratch golfer on a set of tees.
- Slope Rating: how much harder the course plays for a bogey golfer than for a scratch golfer. 113 is standard.
- Adjusted gross score: your score after limiting each hole to net double bogey.
Worked Example
You shoot an adjusted 92 on tees rated 71.2 with a Slope of 128.
- Score Differential = 113 ÷ 128 × (92 − 71.2)
- = 0.8828 × 20.8 = 18.4
- With a Handicap Index of 15.6, your Course Handicap on these tees (par 72) is 17
Real-Life Examples
- A new golfer: after 3 rounds with differentials of 22.4, 25.1 and 24.0, the estimate is 22.4 − 2.0 = 20.4.
- Choosing tees: with a Handicap Index of 15.0, tees with Slope 140, rating 73.5 and par 72 give a Course Handicap of 20, but forward tees with Slope 118, rating 69.0 give 13.
- Matches with friends: compare Course Handicaps on the same tees to set strokes.
- Tracking progress: watch how new good rounds replace older ones in your best 8.
Handicap Index vs Course Handicap
- Handicap Index: one number that travels with you to any course.
- Course Handicap: the strokes for a specific set of tees, based on its Slope and Course Rating.
- Playing Handicap: the Course Handicap after any handicap allowance for the format, such as 95% in four-ball stroke play.
Fewer Than 20 Scores
| Scores in record | Differentials used | Adjustment |
|---|---|---|
| 3 | Lowest 1 | −2.0 |
| 4 | Lowest 1 | −1.0 |
| 5 | Lowest 1 | 0 |
| 6 | Average of lowest 2 | −1.0 |
| 7 or 8 | Average of lowest 2 | 0 |
| 9 to 11 | Average of lowest 3 | 0 |
| 12 to 14 | Average of lowest 4 | 0 |
| 15 or 16 | Average of lowest 5 | 0 |
| 17 or 18 | Average of lowest 6 | 0 |
| 19 | Average of lowest 7 | 0 |
| 20 | Average of lowest 8 | 0 |
Common Mistakes to Avoid
- Using your raw score. Use the adjusted gross score, with each hole capped at net double bogey.
- Mixing up Course Rating and par. Course Rating is usually not a whole number, like 71.2.
- Using the wrong tees. Enter the ratings for the tees you actually played.
- Entering 9-hole scores as 18. This calculator expects 18-hole scores.
- Treating the estimate as official. Only your golf association issues an official Handicap Index.
Frequently Asked Questions
Each round becomes a Score Differential: 113 ÷ Slope × (adjusted score − Course Rating). Your Handicap Index is the average of your lowest 8 of your last 20.
A Handicap Index can be calculated with as few as three 18-hole scores, according to the USGA.
The lower the better. Many average golfers are in the mid-teens to mid-20s.
54.0 under the World Handicap System.
The number of strokes you get on a specific set of tees: Handicap Index × Slope ÷ 113 + (Course Rating − par).
The highest score you can record on a hole for handicap purposes: par + 2 + any strokes you receive on that hole.
The Handicap Index reflects your potential, not your average, so it uses your better rounds.
On the scorecard, at the clubhouse, or in your golf association’s course rating database.
Yes, if you score better than the Course Rating, such as a very good player on an easy course.
No. It is an estimate. Official handicaps also use the Playing Conditions Calculation and safeguards like the soft and hard cap.
It is the standard difficulty. Higher slopes give more strokes, and lower slopes give fewer.
Yes, but only the most recent 20 are used, as in the official system.
References & Sources
| Source | Used For | Link |
|---|---|---|
| USGA, Rule 5.2a For Fewer Than 20 Scores | How many differentials are used, and the adjustments. | https://www.usga.org/handicapping/roh/Content/rules/5%202a%20For%20Fewer%20Than%2020%20Scores.htm |
| USGA, How is a Handicap Index calculated? | Best 8 of 20 and the minimum of three scores. | https://www.usga.org/content/usga/home-page/handicapping/world-handicap-system/world-handicap-system-usga-golf-faqs/faqs—how-is-a-handicap-index-calculated.html |
| Wikipedia, Handicap (golf) | Slope Rating, Course Rating and the formulas. | https://en.wikipedia.org/wiki/Handicap_(golf) |