A golf scorecard might list a pair of numbers such as 71.7/135 beside a set of tees. Most golfers know that they describe difficulty. Far fewer know that the two numbers answer different questions.
Course Rating estimates the score a scratch golfer is expected to shoot from those tees under normal conditions. Slope Rating measures how much harder those tees become for players who are not scratch, relative to the scratch golfer.
That distinction matters. A Slope Rating of 140 does not mean a course is 140 percent as difficult as another course, and it does not predict what you will shoot. Course Rating and Slope Rating work together to convert your Handicap Index into a Course Handicap for the tees you are actually playing.
The short answer
| Number | What it measures | How to read it |
|---|---|---|
| Par | The score assigned to the holes | A familiar reference point, not a complete measure of difficulty |
| Course Rating | Expected score for a scratch golfer under normal conditions | A rating of 71.7 means about 71.7 strokes from those tees |
| Bogey Rating | Expected score for the rating system's bogey golfer | The higher-handicap reference used to calculate slope |
| Slope Rating | Relative difficulty for non-scratch golfers compared with scratch golfers | 113 represents standard relative difficulty |
Course Rating tells you where the difficulty starts. Slope Rating tells you how quickly that difficulty increases as a player's handicap rises.
Course Rating starts with the scratch golfer
Course Rating belongs to a specific set of tees, not simply to the golf course as a whole. Move forward or back, and the effective length, hazards and angles change. The rating changes with them.
Suppose a par-72 course has a Course Rating of 74.2 from the back tees. A scratch golfer is expected to take about 74.2 strokes under normal conditions, so those tees play roughly 2.2 strokes harder than par for that golfer.
If the forward tees are rated 68.9, the opposite is true. A scratch golfer is expected to score about 3.1 strokes below the posted par of 72.
This is why par cannot tell you how difficult a course really is. Two courses can both be par 72 while one is rated 69.0 and the other 75.0. The scorecards share a par, but the scratch golfer faces two very different tests.
The decimal is useful too. Course Rating is not trying to guess one exact score on one exact day. It creates a consistent benchmark that can be used across thousands of courses and sets of tees.
Bogey Rating creates the other end of the scale
Rating teams also calculate a Bogey Rating. This estimates the score for the higher-handicap reference golfer defined by the rating system.
Bogey Rating rarely gets the same attention because it may not be printed prominently on the scorecard. It is still essential. The gap between Bogey Rating and Course Rating shows how differently the course affects the bogey golfer and the scratch golfer.
A long forced carry offers a simple example. It might present little difficulty to the scratch player but force the bogey player to lay up or bring a penalty area into play. The obstacle affects both golfers, but not equally.
That unequal effect is what Slope Rating is designed to capture.
What Slope Rating actually measures
Slope Rating describes relative difficulty. A course with a Slope Rating of 113 is considered standard in relative difficulty. A number above 113 means expected scores rise more quickly for higher-handicap golfers. A number below 113 means they rise more slowly.
The word "slope" comes from the relationship between expected score and ability. Imagine a graph with player handicap on one axis and expected score on the other. Slope Rating describes how steeply that line rises.
This leads to the most common misunderstanding:
A higher Slope Rating does not automatically mean a course is harder for every golfer.
A course can have a high Course Rating and a moderate Slope Rating. That means it begins as a difficult test for the scratch golfer, but the gap between scratch and bogey performance grows at a more moderate rate.
Another course can have a lower Course Rating and a higher Slope Rating. It may be manageable for the scratch golfer while penalizing the bogey golfer much more severely.
You need both numbers to understand the test.
How rating teams produce the numbers
Course ratings are not based on reputation, green fees or a simple average of posted scores. Trained rating teams evaluate each set of tees.
They begin with measured yardage, then account for factors that change the effective playing length, including elevation, roll and forced layups. They also evaluate how obstacles affect scratch and bogey golfers differently. A bunker that a longer player can carry may sit directly in the landing area of a shorter player. A narrow opening, severe rough or a demanding recovery can create different costs for each reference golfer.
That work produces separate scratch and bogey estimates. Course Rating comes from the scratch estimate. The difference between the scratch and bogey estimates produces Slope Rating.
Ratings can therefore differ by tee and by the player category shown on the scorecard. Always use the rating assigned to the exact tees you played.
The formula that changes your handicap
Your Handicap Index is designed to travel with you. Your Course Handicap adjusts that index for the course and tees in front of you.
For an 18-hole round, the current formula is:
Course Handicap = Handicap Index × (Slope Rating ÷ 113) + (Course Rating − par)
Each part has a job:
- Handicap Index represents your demonstrated ability.
- Slope Rating ÷ 113 adjusts for relative difficulty.
- Course Rating − par adjusts for how hard the tees are compared with their posted par.
Consider a golfer with a 15.0 Handicap Index playing tees rated 71.7/135 on a par-72 course:
15.0 × (135 ÷ 113) + (71.7 − 72) = 17.62
For the whole-number applications of Course Handicap, that becomes 18.
Adding 15 to par would miss the point. The same player should not receive the same number of strokes from every course and every set of tees.
You can run the calculation for your own index with Ingrain's golf handicap calculator.
A real example from Pebble Beach
The current men's ratings at Pebble Beach Golf Links show how much the tee selection matters. The course is par 72.
| Tees | Course Rating | Slope Rating | Result for a 15.0 index | Whole-number Course Handicap |
|---|---|---|---|---|
| Blue | 74.9 | 144 | 22.02 | 22 |
| White | 71.7 | 135 | 17.62 | 18 |
| Green | 68.7 | 126 | 13.43 | 13 |
The golfer has not become better or worse by changing tees. The 15.0 Handicap Index stays the same. The Course Handicap moves by nine strokes because each set of tees presents a different test.
The Blue tees affect both parts of the formula. Their 144 slope increases the relative-difficulty adjustment, while their 74.9 Course Rating adds another 2.9 strokes above par.
The Green tees still have a slope above 113, so they are not automatically easy for a higher-handicap player. But their 68.7 Course Rating sits 3.3 strokes below par, which pulls the Course Handicap down.
This is the useful way to read a scorecard. Course Rating establishes the baseline. Slope Rating changes how that baseline applies to your ability.
Course Handicap is not always Playing Handicap
The handicap system uses two related terms that are easy to confuse.
Course Handicap is the number of strokes needed to adjust a player's ability to the course and tees. It is also used when applying score adjustments such as net double bogey.
Playing Handicap applies the allowance for a particular format of play:
Playing Handicap = Course Handicap × handicap allowance
If the format uses a 100 percent allowance, the two numbers may be the same. Other formats use different allowances to create equity between fields and partners. The unrounded Course Handicap is retained when calculating Playing Handicap, and the final result is then rounded.
So the sequence is:
- Start with Handicap Index.
- Use rating, slope and par to calculate Course Handicap.
- Apply the competition allowance to calculate Playing Handicap when required.
Three mistakes to avoid
Comparing courses by slope alone. Slope only describes relative difficulty. Compare Course Rating and Slope Rating together.
Treating 113 as the average of all golf courses. It is the standard relative-difficulty value used in the formula. It is not a live average of every rated course.
Using the rating from the wrong tees. Rating and slope belong to a specific tee set and player category. A number copied from another line on the scorecard can change the calculation by several strokes.
The numbers also should not choose your tees for you. A suitable tee depends on how far you actually hit the ball, the shots the layout asks you to play and the experience you want. If the yardages in your head are based on your best swings, start by building a club-distance chart you can trust.
How to use rating and slope before a round
Before you play, find the exact tee line and read the numbers in this order:
- Compare Course Rating with par to understand the scratch baseline.
- Compare Slope Rating with 113 to understand the relative effect on higher-handicap players.
- Convert your Handicap Index into a Course Handicap.
- Check whether the format applies a handicap allowance.
- Use the final Playing Handicap for the competition.
Ingrain's course lookup brings tee yardage, par, Course Rating and Slope Rating together so you can check the numbers before choosing a tee or calculating your strokes.
If you are wondering how your index compares with everyone else's, the published handicap data is more surprising than most golfers expect. The average Handicap Index does not describe the average person who plays golf, and even an indexed golfer usually scores several shots higher than the number suggests.
Course Rating and Slope Rating are what make that index portable. One number describes your demonstrated ability. The other numbers translate it into the golf course you are about to play.
Research behind this article
Definitions of Course Rating, Bogey Rating and Slope Rating, along with the explanation of how rating teams evaluate effective playing length and obstacles, come from the USGA's Course Rating and Slope Rating guidance and its article on the difference between Course Rating and Slope Rating.
The Course Handicap and Playing Handicap formulas, including the order of rounding, follow the USGA Rules of Handicapping FAQ.
Pebble Beach tee ratings were checked against the official 2026 Pebble Beach Golf Links scorecard and the tee data stored in Ingrain.
