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Golf Handicap Calculator
Calculate your Handicap Index the World Handicap System way. Paste your scores with each course's rating and slope, and get every score differential, the rounds that count (best 8 of your last 20, or fewer if you have played less) and your Course Handicap for the next course.
Use your adjusted gross score (net double bogey max per hole). Add a 4th number for PCC if your round had one.
Enter your values to see the result.
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How to use the Golf Handicap Calculator
- Enter one round per line: adjusted gross score, course rating and slope, separated by commas or spaces, oldest first.
- Add a 4th number on a line if that day had a playing conditions calculation (PCC) other than 0.
- Tick Course Handicap and enter the slope, rating and par of the tees you'll play next.
- Press Calculate handicap to see your Handicap Index, Course Handicap and the working.
- Check the table to see each differential and which rounds count toward your index.
WHS handicap formulas
- Score differential = (113 ÷ slope rating) × (adjusted gross score − course rating − PCC)
- Handicap Index = average of the lowest differentials from your last 20 rounds (see table) + adjustment
- Course Handicap = Handicap Index × (slope ÷ 113) + (course rating − par)
- Playing Handicap = Course Handicap × allowance (95% for individual stroke play)
Example: a score of 88 on a course rated 70.4 with slope 125 gives (113 ÷ 125) × (88 − 70.4) = 0.904 × 17.6 = 15.9.
How many differentials count
| Rounds 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 – 8 | Average of lowest 2 | 0 |
| 9 – 11 | Average of lowest 3 | 0 |
| 12 – 14 | Average of lowest 4 | 0 |
| 15 – 16 | Average of lowest 5 | 0 |
| 17 – 18 | Average of lowest 6 | 0 |
| 19 | Average of lowest 7 | 0 |
| 20 | Average of lowest 8 | 0 |
The maximum Handicap Index is 54.0. A plus handicap (better than scratch) is shown with a + sign, for example +1.2. 9-hole scores are combined into 18-hole differentials under WHS rules, so enter 18-hole equivalents here.
Frequently asked questions
How is a golf handicap calculated?
Under the World Handicap System, each round gets a score differential: (113 ÷ slope rating) × (adjusted gross score − course rating − PCC). Your Handicap Index is the average of the lowest 8 differentials from your most recent 20 rounds, rounded to one decimal place.
How many rounds do I need for a handicap?
You need scores from at least 54 holes, such as three 18-hole rounds. With 3 rounds the index is your lowest differential minus 2.0; with 4 it is the lowest minus 1.0; with 5 it is the lowest; with 6 it is the average of the lowest 2 minus 1.0, and so on until 20 rounds, when the best 8 are used.
What is the adjusted gross score?
It is your score after limiting bad holes. For handicap purposes the maximum on any hole is net double bogey: par + 2 + any handicap strokes you receive on that hole. New golfers without an index use par + 5 as the limit.
What are course rating and slope?
Course rating is the score a scratch golfer is expected to shoot from a set of tees, such as 71.4. Slope rating measures how much harder the course is for a bogey golfer compared with a scratch golfer, from 55 to 155, with 113 as the standard. Both are printed on the scorecard.
What is the difference between Handicap Index and Course Handicap?
Your Handicap Index is portable and measures your ability on a course of standard difficulty. Course Handicap converts it to strokes for specific tees: Handicap Index × (slope ÷ 113) + (course rating − par). A 15.0 index on tees with slope 128, rating 71.2 and par 72 gives a Course Handicap of 16.
Will this match my official handicap?
It uses the same WHS formulas, but official handicaps also apply soft and hard caps that limit how fast an index can rise compared with your lowest index of the past year, plus exceptional score reductions. Those need your full history, so use this calculator as an estimate and rely on your golf association for the official number.
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