Golf Handicap Calculator

Index, Course, Playing: the three numbers people mix up

Three handicap numbers get used interchangeably, and only one of them is what you write on the card.

Handicap Index

Your portable number — a single figure like 18.0 that travels with you and doesn't change from course to course. It's what your app or GHIN shows.

Course Handicap

That Index converted to the specific course and tees, using the Slope and Course Rating. Off the back tees of a hard course it goes up; off the forward tees of an easy one it comes down.

Playing Handicap

Your Course Handicap after the competition's format allowance — 95% for singles stroke play, 85% for four-ball — which keeps things fair across formats. A casual round just uses your full Course Handicap.

Enter your Index above and the calculator shows all three in order, so you can see exactly how 18.0 becomes the number you actually get shots off. Once you know your Course Handicap, our Club Distance & Gapping Calculator is the natural next step for turning it into smarter club selection.

The formula, in plain English

Under the World Handicap System, Course Handicap = Handicap Index × (Slope Rating ÷ 113) + (Course Rating − Par). The slope term scales your Index to how punishing the course is for a regular golfer — 113 is neutral, so a 155-slope monster gives you more shots and a gentle 95-slope track gives you fewer. The rating-minus-par term corrects for courses that play meaningfully harder or easier than their par. Competitions then apply a format allowance to produce your Playing Handicap — 95% in individual stroke play, 85% in four-ball — which is why the number you write on the card is rarely the number in your handicap app. This calculator runs the official maths and shows the working, so you can sanity-check it against the chart in the pro shop.

Frequently asked

How is a Course Handicap calculated under the WHS?

Course Handicap = Handicap Index x (Slope Rating / 113) + (Course Rating - Par), rounded to the nearest whole number. Slope Rating measures how much harder a course plays for a bogey golfer than a scratch golfer, 113 is the neutral baseline, and the Course Rating minus Par adjustment accounts for courses that play easier or harder than their par suggests.

What is the difference between Course Handicap and Playing Handicap?

Your Course Handicap converts your Handicap Index to the specific course and tees you are playing. Your Playing Handicap then applies the format allowance for the competition — the WHS recommends 95 percent for individual stroke play, 85 percent for four-ball stroke play and 90 percent for four-ball match play. For a casual round, most golfers just use their full Course Handicap.

Where do I find the Slope Rating and Course Rating?

Both are printed on the scorecard for each set of tees, and usually on a board by the first tee or in the pro shop. Slope Rating runs from 55 to 155 with 113 as the average; Course Rating is a number like 71.2 that estimates what a scratch golfer would shoot. Make sure you read the line for the tees you are actually playing.

Which holes do I get my shots on?

Shots are taken in stroke-index order. Each hole on the card has a stroke index from 1 (hardest) to 18 (easiest); a Playing Handicap of 12 gives you one shot on each of stroke index 1 through 12. If your Playing Handicap is above 18, you receive a second shot starting back at stroke index 1.

What is the maximum golf handicap?

The maximum Handicap Index under the World Handicap System is 54.0 for all golfers. Your Course Handicap on a difficult course can work out higher than your Index, and that is normal — the slope adjustment is doing its job.

How do I get a golf handicap in the first place?

You need a Handicap Index issued by a body that runs the World Handicap System — in most countries that means joining a golf club or a national affiliate, and in the US a club that provides a GHIN number. You submit a handful of scores (typically enough rounds to total 54 holes) and the system calculates your starting Index from them. Once you have an Index, this calculator converts it to your Course and Playing Handicap for any set of tees.

How is a 9-hole handicap calculated?

For a nine-hole round you use the 9-hole Course Rating, Slope Rating and par printed for those nine holes, and the same formula applies. Your Handicap Index also has a 9-hole version — roughly half your 18-hole Index — which the WHS combines with a second nine when you post the round. To use this tool for nine holes, enter the 9-hole rating, slope and par for the tees you are playing.

What does it mean to ‘play off’ a handicap?

‘Playing off 12’ means your Playing Handicap for the round is 12 — you get 12 strokes, allocated one to each hole from stroke index 1 to 12. It is the number that actually adjusts your score in a competition, after the course conversion and any format allowance, and it is usually lower than your Handicap Index — which is exactly why the two get confused.

What is a good golf handicap?

Commonly cited figures put the average men’s Handicap Index around 14 and the average women’s in the mid-20s, so anything in the low teens is better than most golfers. Single figures (9 and below) is the traditional mark of a strong club player, and scratch (0) means you play to the course rating. ‘Good’ is relative to your goals, though — steady improvement matters more than any milestone.

More free tools: the Club Distance & Gapping Calculator, the Home Sim Build Planner and the rest of the tools collection.