Golf Handicap Calculator (WHS)
Calculate a WHS-style Handicap Index from 3–20 recent 18-hole rounds, or find your course handicap for a set of tees. Enter your adjusted gross scores and course ratings, or your current Handicap Index and tee ratings.
Find Your Handicap Index or Course Handicap
Golf Handicap Formula
Where:
- \(D_i\) — a round’s score differential, rounded to one decimal before selection and averaging.
- \(G_i\), \(R_i\), and \(S_i\) — that round’s adjusted gross score, course rating, and slope rating.
- \(n\) — the number of lowest differentials used; \(A\) — the adjustment for the number of rounds entered.
- \(H\) — Handicap Index; \(C\) — course handicap in strokes.
- \(S\), \(R\), and \(P\) — slope rating, course rating, and par for the tees you will play.
The calculator selects the required number of lowest differentials, averages them, applies any adjustment, and limits the resulting index to 54.0. It calculates course handicap separately from the Handicap Index and the ratings of the selected tees.
Golf Handicap – Calculation Example
Example: The default three rounds have adjusted gross scores of 88, 91, and 86. Each has a course rating of 72.0 and a slope rating of 113.
\[D_1=88-72=16.0,\qquad D_2=91-72=19.0,\qquad D_3=86-72=14.0\]
With three rounds, the lowest differential is used and an adjustment of −2.0 applies.
\[H=14.0-2.0=12.0\]
Result: the Handicap Index is 12.0. Using the course-handicap tab’s default slope rating of 125, course rating of 71.9, and par of 72 gives \(12.0\times125/113+71.9-72=13.17\), or 13 strokes after rounding.
How to use the calculator
- Under Calculation, choose Handicap Index to estimate an index from scores, or Course handicap to convert an existing index for particular tees.
- For an index, set Number of rounds to between 3 and 20. Enter your most recent 18-hole rounds from oldest to newest, so Round 1 is the oldest round you include.
- For each visible round, fill in Round 1: adjusted gross score, Round 1: course rating, and Round 1: slope rating, then the corresponding fields for every other round. Use the rating and slope for the tees played on each occasion.
- Read Handicap Index, Differentials used, and Round-by-round differentials. The highlighted rounds are the ones included in the index calculation.
- For a course handicap, choose Course handicap and enter Handicap Index, Slope rating, Course rating, and Par for the tees you intend to play. This tab does not automatically copy the index calculated on the other tab.
What your golf handicap means
A Handicap Index expresses a golfer’s demonstrated scoring ability on a standard scale. It is not simply the average number of strokes you shoot over par. Each round becomes a score differential that accounts for its adjusted gross score, course rating, and slope rating. A course rating describes the expected score of a scratch golfer from those tees; a slope rating describes their relative difficulty for a bogey golfer compared with a scratch golfer.
The calculator uses the lowest differentials rather than averaging every round. With 20 scores, it averages the lowest eight; with fewer scores, it follows the corresponding selection and adjustment schedule shown below. A lower Handicap Index generally indicates stronger demonstrated scoring ability. Because it reflects selected rounds, the index should not be read as a prediction of your score in the next round.
Course handicap answers a different question: how many handicap strokes correspond to your index on the tees you plan to play. It changes with slope rating and with the difference between course rating and par. A playing handicap may then differ again if a competition applies a handicap allowance for its format. Check the event’s terms before deciding how many strokes you receive.
Assumptions and practical limits
Enter adjusted gross scores, not unadjusted totals. Under WHS, a score for handicap purposes may need hole-by-hole adjustment, including the applicable maximum hole score. This calculator accepts only complete 18-hole scores; it does not combine nine-hole scores or determine adjustments from a hole-by-hole card. Ratings and par must match the tees and course used.
Each differential is rounded to one decimal before the lowest are selected and averaged. The index is rounded to one decimal and capped at 54.0. The calculator applies the listed short-record adjustments, but it does not account for every process used by an official handicapping service, such as a Playing Conditions Calculation, exceptional score reductions, or soft and hard caps based on a player’s previous index. Use your official handicap record when an event requires one.
For a walking round, the steps-to-miles calculator can put your walking total in context. If you will be outside for several hours, the UV index sunburn time calculator can help you plan sun protection; neither affects your handicap calculation.
How many differentials are used?
| 18-hole rounds entered | Lowest differentials used | Adjustment |
|---|---|---|
| 3 | 1 | −2.0 |
| 4 | 1 | −1.0 |
| 5 | 1 | None |
| 6 | 2 | −1.0 |
| 7–8 | 2 | None |
| 9–11 | 3 | None |
| 12–14 | 4 | None |
| 15–16 | 5 | None |
| 17–18 | 6 | None |
| 19 | 7 | None |
| 20 | 8 | None |
Frequently Asked Questions
How can I calculate a WHS Handicap Index by hand?
Start with your most recent eligible scores and calculate a differential for each round using its adjusted score and the ratings of the tees played. Round each differential to one decimal, then rank them from lowest to highest. If you have 20 scores, average the lowest eight and round the result to one decimal. With fewer scores, use the selection and adjustment schedule above. An official index may also include adjustments this calculator cannot reproduce.
What is a good golf handicap?
There is no universal “good” Handicap Index; it depends on your goals and who you play with. An index below 10 is commonly called a single-digit handicap, while 0.0 is scratch. A negative index indicates a player whose demonstrated ability is better than scratch. Your index is a measure of ability across courses, not the number of strokes you should expect to shoot over par.
How do I adjust a hole score for handicap purposes?
For a player with an established handicap, the usual maximum hole score for handicap purposes is net double bogey: the hole’s par plus two strokes, plus any handicap strokes received on that hole. For example, on a par 4 where you receive one stroke, the maximum is 7. Your actual score still counts for the round or competition; the adjusted figure is used when submitting a score for handicap purposes.
Is slope rating measured in strokes, and why is 113 used?
Slope rating is a relative difficulty scale, not a number of strokes to add to your score. A slope of 113 is the standard reference used to put score differentials on a common scale; published slopes generally range from 55 to 155. Course rating, by contrast, is expressed as an expected number of strokes for a scratch golfer. Use the published values for the specific tees you played.
Can I get a handicap from nine-hole rounds?
Nine-hole scores may be eligible for an official WHS handicap, but this calculator only accepts complete 18-hole scores. Under current WHS procedures, an eligible nine-hole score can be converted into an 18-hole score differential using an expected differential for the unplayed holes; your handicapping service handles that process. Do not simply double your nine-hole score or enter it as an 18-hole round.
Why did my handicap go up after I played a good round?
Your index can rise if an older, particularly low differential leaves your most recent 20 scores when the new round is added. The new round may feel good without producing a differential low enough to replace it. Course difficulty matters too: the same gross score can produce different differentials from different tees. Check which rounds were selected before comparing the new result with your previous index.
How do I turn a course handicap into a playing handicap?
Apply the competition’s handicap allowance to your course handicap, then round as required by the event’s rules. For example, a course handicap of 13 strokes with a 95% allowance gives \(13\times0.95=12.35\), typically a playing handicap of 12 strokes. Allowances vary by format, and some competitions make further adjustments. Use the event’s published terms to determine how many strokes you receive.