How the World Handicap System works
Golf handicaps, explained
In short
A Handicap Index is a measure of your potential: roughly how many strokes over a course of standard difficulty you shoot on a good day. Under the World Handicap System (WHS), used in the US since 2020, each round becomes a Score Differential: (113 ÷ Slope Rating) × (adjusted gross score − Course Rating). Your Handicap Index is the average of the lowest 8 of your most recent 20 differentials, or fewer when you have fewer rounds. Before you tee off, your index is turned into a Course Handicap for the tees you play: Index × Slope ÷ 113 + (Course Rating − Par). That is how many strokes you receive. The maximum index is 54.0. Our handicap calculator does both steps.
- Free toolGolf Handicap CalculatorHandicap Index from your rounds, plus Course and Playing Handicap for any tee.
- Free toolCourse Handicap CalculatorIndex to Course and Playing Handicap for any tee, with the holes you get strokes on.
- Free toolScramble Handicap CalculatorTeam handicap for 2, 3 and 4-person scrambles with the USGA allowances.
From scores to a Handicap Index
Each hole counts at most net double bogey for handicap purposes, so one disaster hole does not wreck your record. The step-by-step handicap calculation walks through a full example, including the table for players with fewer than 20 rounds. If you only want the number, the calculator does it from your scores.
Course Handicap and Playing Handicap
Your Handicap Index travels with you; your Course Handicap changes with the tees. Harder tees (higher Slope and Course Rating) give you more strokes, and the course handicap calculator shows how many you get and on which holes. For team events, the scramble handicap calculator applies the USGA percentages for 2, 3 and 4-player teams. In some formats a handicap allowance applies: 95% of Course Handicap in individual stroke play, for example, which gives your Playing Handicap.
Getting an official handicap
In the US an official Handicap Index comes through a golf club, which can be a club without a course of its own, that is licensed by the USGA through an Allied Golf Association. You post scores in the GHIN system after each round. After 54 holes, three 18-hole rounds or any mix of 9- and 18-hole scores, you get your first index.
What is a good handicap?
The guide to average and good handicaps sets out what the numbers mean in practice, and why most recreational golfers carry a double-digit index.
Frequently asked questions
How is a golf handicap calculated?
Each round's Score Differential is (113 ÷ Slope Rating) × (adjusted gross score − Course Rating − PCC). Your Handicap Index is the average of the lowest 8 of your last 20 differentials, rounded to the nearest tenth.
What is the maximum golf handicap?
Under the World Handicap System the maximum Handicap Index is 54.0 for all players.
How many rounds do you need for a handicap?
54 holes: three 18-hole rounds, six 9-hole rounds, or any combination that adds up to 54.
All handicap guides
Coming to this guide
Being written and checked against the Rules and other primary sources now.
- How to get a golf handicap (GHIN)
- Course Rating and Slope Rating explained
- Handicap Index vs Course Handicap
- Stroke index: where you get your shots
- Net double bogey explained
- How 9-hole scores count
- The maximum handicap