Golf handicap calculator (World Handicap System)

Golf handicap calculator: World Handicap System Handicap Index from your score differentials (best 8 of 20), then course and playing handicap for any tee.

Mis à jour 28 septembre 2026Exemples vérifiés : 8

Start from

Rounds: score, Course Rating, Slope, PCC

One 18-hole round per line, oldest first: adjusted gross score, Course Rating, Slope Rating and an optional PCC (−1 to +3). A line with a single number is read as a score differential.

Course Rating of the tees you play

Slope Rating

Par

Handicap allowance

Rules of Handicapping Appendix C recommendations.

Plus d’options

Low Handicap Index (previous 365 days) (facultatif)

Only for the soft and hard caps (Rule 5.8), which apply once you have 20 scores. Leave blank to skip them.

Essayer

Handicap Index

Décimales : 1 ; Au plus proche, égalités vers le chiffre pair

Differentials counted: Lowest 8 of the most recent 20
Average of those counted: 12.2125
Rule 5.2a adjustment: 0.0
Course handicap: 14strokes
Course handicap before rounding: 13.9434
Playing handicap: 13strokes

The lowest 8 of your last 20 score differentials give a Handicap Index of 12.2. On tees rated 71.8 with a slope of 131 and par 72, a 12.2 index is a course handicap of 14 and a playing handicap of 13 at 95%.

Score differentials by round

CountedNot counted

Rounds and score differentials Lignes : 20

#	Score	Rating	Slope	PCC	Differential	Counts
1	88	71.8	131	0	14	Yes
2	92	70.4	124	0	19.7
3	85	71.8	131	0	11.4	Yes
4	90	72.6	135	1	13.7	Yes
5	87	70.4	124	0	15.1
6	94	71.8	131	0	19.1
7	86	72.6	135	0	11.2	Yes
8	89	70.4	124	0	17
9	91	71.8	131	1	15.7
10	84	70.4	124	0	12.4	Yes
11	93	72.6	135	0	17.1
12	88	71.8	131	0	14
13	86	70.4	124	0	14.2
14	95	72.6	135	2	17.1
15	87	71.8	131	0	13.1	Yes
16	90	70.4	124	0	17.9
17	85	72.6	135	0	10.4	Yes
18	89	71.8	131	0	14.8
19	83	70.4	124	0	11.5	Yes
20	92	71.8	131	0	17.4

Comment le calcul est effectué S

Score differential, round 20
$\frac{113}{131} \times (92 - 71.8 - 0) = 17.424 \rightarrow 17.4$
Each round is rounded to the nearest tenth, .5 upwards (Rule 5.1). The table lists every round.
Choose the differentials
20 differentials in the scoring record: Rule 5.2 counts the lowest 8.
Average and adjust
$\frac{10.4 + 11.2 + 11.4 + 11.5 + 12.4 + 13.1 + 13.7 + 14.0}{8} = 12.2125 \rightarrow 12.2$
Rounded to the nearest tenth (Rule 5.2).
Course handicap
$12.2 \times \frac{131}{113} + (71.8 - 72) = 13.9434 \rightarrow 14$
Rounded to the nearest whole number, .5 upwards (Rule 6.1). A negative result is a plus handicap.
Playing handicap
$13.9434 \times 0.95 = 13.2462 \rightarrow 13$
The allowance is applied to the unrounded course handicap (Rule 6.2a).

À propos de Golf handicap calculator (World Handicap System)

The World Handicap System turns each round into a score differential: (113 ÷ Slope Rating) × (adjusted gross score − Course Rating − PCC), rounded to the nearest tenth. The Handicap Index is the average of the lowest 8 of your most recent 20 differentials. With 3 to 19 differentials, Rule 5.2a's table sets how many count and subtracts 2.0 or 1.0 when there are only 3, 4 or 6. The course handicap for a set of tees is Handicap Index × (Slope Rating ÷ 113) + (Course Rating − par).

The default 20 rounds give differentials from 10.4 to 19.7; the lowest 8 average 12.2125, so the Handicap Index is 12.2. On a course rated 71.8 with a slope of 131 and par 72, that is a course handicap of 14 and a playing handicap of 13 at the 95% stroke-play allowance.

Enter adjusted gross scores, each hole capped at net double bogey, or paste differentials from a handicap app. Exceptional score reductions are not applied, because they need your index as it stood on each day.

Exemples détaillés

20 rounds on three courses

Start from: My scores
Rounds: score, Course Rating, Slope, PCC: 88, 71.8, 131 92, 70.4, 124 85, 71.8, 131 90, 72.6, 135, 1 87, 70.4, 124 94, …
Course Rating of the tees you play: 71.8
Slope Rating: 131
Par: 72
Handicap allowance: 95%

Handicap Index: 12.2
Average of those counted: 12.2125
Differentials counted: Lowest 8 of the most recent 20
Course handicap: 14 strokes
Course handicap before rounding: 13.9434
Playing handicap: 13 strokes

Source de vérification : Python decimal: 20 differentials rounded per Rule 5.1 (89 on 70.4/124 gives 16.95, rounded up to 17.0); lowest 8 average 12.2125 → 12.2; 12.2 × 131/113 − 0.2 = 13.9434 → 14; × 0.95 = 13.25 → 13

Rules example: three differentials

Start from: My scores
Rounds: score, Course Rating, Slope, PCC: 15.3 15.2 16.6
Course Rating of the tees you play: 71.8
Slope Rating: 131
Par: 72
Handicap allowance: 95%

Handicap Index: 13.2
Rule 5.2a adjustment: -2.0
Differentials counted: Lowest 1 of 3

Source de vérification : Rules of Handicapping 2024, Clarification 5.2a/1: 15.2 − 2 = 13.2

Rules example: six differentials

Start from: My scores
Rounds: score, Course Rating, Slope, PCC: 40.7 42.4 36.1 45.9 43.6 45.0
Course Rating of the tees you play: 71.8
Slope Rating: 131
Par: 72
Handicap allowance: 95%

Handicap Index: 37.4
Average of those counted: 38.4
Rule 5.2a adjustment: -1.0

Source de vérification : Rules of Handicapping 2024, Clarification 5.2a/2: average of lowest two 38.4 − 1 = 37.4

Rules example: double rounding, index 8.6

Start from: My Handicap Index
Handicap Index: 8.6
Course Rating of the tees you play: 71
Slope Rating: 125
Par: 71
Handicap allowance: 85%

Course handicap before rounding: 9.5133
Course handicap: 10 strokes
Playing handicap: 8 strokes

Source de vérification : Rules of Handicapping 2024, Clarification 6.2a/1: Course Handicap 9.5132…, Playing Handicap (85%) 8

Questions

How is a golf handicap calculated?

Each round becomes a score differential, (113 ÷ Slope Rating) × (adjusted gross score − Course Rating − PCC). The Handicap Index is the average of the lowest 8 of the most recent 20 differentials, rounded to the nearest tenth (Rules of Handicapping, Rule 5.2b). A score of 88 on a course rated 71.8 with a slope of 131 gives (113 ÷ 131) × 16.2 = 14.0.

How many rounds do you need for a handicap?

Scores from at least 54 holes, such as three 18-hole rounds (Rule 4.5). With 3 differentials the index is the lowest one minus 2.0; with 4 it is the lowest minus 1.0; with 5 the lowest; with 6 the average of the lowest 2 minus 1.0. The count used then rises to the lowest 8 of 20. The Rules' own example turns differentials of 15.3, 15.2 and 16.6 into an initial index of 13.2.

What is the difference between Handicap Index and course handicap?

The Handicap Index measures ability on a course of standard difficulty, Slope Rating 113. The course handicap is the number of strokes you get on a particular set of tees: Handicap Index × (Slope ÷ 113) + (Course Rating − par), rounded to a whole number with .5 rounded up (Rule 6.1). A 12.2 index on tees rated 71.8, slope 131, par 72 plays to 14.

What is the maximum score per hole for handicap purposes?

Net double bogey: par plus 2 plus any handicap strokes you receive on the hole (Rule 3.1b). A player getting one stroke on a par 4 can post no more than 7 there. Until you have a Handicap Index, the limit is par plus 5 (Rule 3.1a). The adjusted gross score is the total after these caps, and it is the figure that goes into the differential.

What are the soft cap and hard cap?

They limit how fast a Handicap Index can rise (Rule 5.8). If a new index is more than 3.0 above your Low Handicap Index from the previous 365 days, only half of the increase beyond 3.0 counts, and the total rise can never exceed 5.0. With a Low Handicap Index of 8.6 and a calculated 12.2, the soft cap gives 8.6 + 3.0 + 0.3 = 11.9.

Quelle est la précision de « Golf handicap calculator (World Handicap System) » ?

La précision dépend de vos données et des hypothèses de la méthode. Le calcul décimal utilise 50 chiffres significatifs, mais les estimations, méthodes numériques et données sources peuvent être moins précises ; l’arrondi affiché ne supprime pas ces limites. Exemples résolus vérifiés à partir de sources indépendantes : 8. Par exemple, « 20 rounds on three courses » est vérifié à l’aide de Python decimal: 20 differentials rounded per Rule 5.1 (89 on 70.4/124 gives 16.95, rounded up to 17.0); lowest 8 average 12.2125 → 12.2; 12.2 × 131/113 − 0.2 = 13.9434 → 14; × 0.95 = 13.25 → 13.

D’où vient cette méthode ?

USGA and R&A — Rules of Handicapping, effective 2024 (Rules 3.1, 4.5, 5.1–5.3, 5.8, 6.1, 6.2, Appendix C); R&A — Rules of Handicapping, Rule 5: Handicap Index calculation; USGA — What exactly are Course Rating and Slope Rating? (slope 55 to 155, standard 113).

À propos de ce calculateur

\begin{gathered}\text{SD} = \frac{113}{\text{Slope}}\,(\text{AGS} - \text{CR} - \text{PCC}) \\ \text{HI} = \overline{\text{lowest 8 of 20 SD}},\qquad \text{CH} = \text{HI} \times \frac{\text{Slope}}{113} + (\text{CR} - \text{par})\end{gathered}

Sources

Vérifié avec les références

Ce calculateur comprend 8 exemples résolus dont les réponses proviennent de sources indépendantes. Ils font partie de la suite de tests et peuvent aussi être exécutés ici.

Score differentials by round

Score differential, round 20

Choose the differentials

Average and adjust

Course handicap

Playing handicap