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Under the World Handicap System your Handicap Index is the average of your best 8 score differentials from your last 20 rounds. Course and slope ratings are on the scorecard or tee sign; 113 is the standard slope. Net double bogey caps hole scores before submission.
What The Golf Handicap Calculator Works Out
- Score differential: the World Handicap System converts each round to (score minus course rating) times 113 divided by the slope rating. A 90 on a 72-rated course of slope 130 is a differential of 15.6. The 113 is the definitional standard slope; slope itself (55 to 155) measures how much harder a course plays for a bogey golfer than a scratch one, which is why the same 90 earns a better differential on a brutal course than a benign one.
- How your handicap index forms: your Handicap Index is the average of the best 8 differentials from your most recent 20 rounds. An average round changes nothing; only rounds that displace a counting score move the index, so the system tracks potential rather than average ability and most golfers play over handicap most days, by design.
- Course handicap example: the index translated back for the day's course: index times slope over 113. More strokes come on tough tees and fewer on easy ones, which is the system's whole fairness argument and the reason the number on the app changes between courses.
- Your current Handicap Index (advanced): enter the index from your England Golf, Scottish Golf, Wales Golf or iGolf app and the calculator works out today's strokes and whether this round would move it.
- Par and course handicap (advanced): in Great Britain and Ireland the course handicap formula adds (course rating minus par), so a course rated 73.2 with a par of 72 gives everyone an extra stroke. The result is rounded to a whole number.
- PCC (advanced): the playing conditions calculation adjusts every differential on a day when scores across the field were abnormally high or low, from -1 (easier) to +3 (very hard). It is applied by the system after the day's scores are in; use it here to see what a windy medal day did to your number.
- Playing handicap (advanced): the course handicap multiplied by the format's allowance: 95% for individual stroke play and Stableford, 100% for match play, 85% for fourball better ball and 50% of the combined handicaps for foursomes. The allowance equalises the odds between high and low handicappers in each format.
- Net score (advanced): gross score minus course handicap, with the result against par and the approximate Stableford points (36 points is playing to handicap). Remember that net double bogey caps any hole at par plus two plus strokes received before the score counts, so one blow-up hole dents pride more than the handicap.
- This round against your index (advanced): a differential 7 or more below your index triggers an exceptional score reduction (an extra 1 off, or 2 if 10 better), while soft and hard caps limit how fast an index can rise. General play rounds count alongside competitions provided they are pre-registered and attested.
- Course handicap table (advanced): what each Handicap Index from scratch to the 54.0 maximum receives on this course, with the playing handicap for your chosen format.