How to Calculate Slope Rating
The slope rating of a golf course is a measure of its difficulty for bogey golfers. The term comes from the likelihood that when playing on more difficult courses, players’ scores will rise more quickly than their handicaps would predict. The “slope rating” of a course thus predicts that rise.
How to Calculate Slope Rating
What is a Slope Rating® and what does it represent? A. Playing length and obstacles impact higher-handicap players more than lower-handicap players, and Slope Rating measures the relative difficulty of a golf course for players who are not scratch players compared to those who are scratch players.
Handicap differential = (Adjusted Gross Score-rating of the course) X 113 / Course slope ratings. The course rating is simply the scores of a new golfer on a normal course under a normal playing condition. Slope rating is the rating of 113 for a course based on the standard difficulty.
The Course Rating is calculated from the effective playing length and obstacle factors for 9 or 18 designated holes. The Course Rating is expressed in strokes to one decimal point and represents the expected score for a scratch player. The Bogey Rating represents the expected score for a bogey player.
Use the following formula to compute the Handicap Differential: Handicap differential = (The Adjusted Gross Score -The Course Rating) X 113 / The Course slope ratings. The course rating refers to the score of a new golf player on a course under standard playing conditions.
The handicap index is an average of golf round scores and has its own calculation. This formula requires you to sum your differentials and divide these by the number of differentials used, and then multiply the result by 0.96. The slope rating is the difficulty of the golf course for an average golfer.
120The higher the slope number, the harder the course is for the bogey golfer relative to the difficulty of the course for the scratch golfer. Slope numbers can range anywhere between 55 and 155 with the average slope in the United States being 120.
Course Ratings represent the difficulty of a golf course for the scratch player under normal conditions. Slope Ratings represent the difference in difficulty for all other players, compared to the scratch player. Course Ratings are carried out by qualified teams, and assume normal course and weather conditions.
The 18-hole "Augusta National" course at the Augusta National Golf Club facility in Augusta, Georgia features 7,270 yards of golf from the longest tees for a par of 72. The course rating is 74.0 and it has a slope rating of 135 on Bermuda grass.
Thus, the slope number converts a golfer’s handicap into a course handicap. In this way, it is made sure that a bogey golfer is allowed to play at an equal level to a scratch golfer, and it helps them obtain enough strokes from the same set of tees. This is the mathematical formula of how it is derived:
The United States Golf Association established the average slope rating to 113, but it has later increased to about 120 as there aren’t many 18-hole golf courses with slope ratings set that low. As has been observed, most golf courses worldwide have average slope ratings of about 120.
What is USGA Golf Course Rating and Who Rates It? USGA Golf Course Rating is an assessment of the difficulty of a given golf course for scratch golfers. The course rating estimates the scratch golfers’ average scores who played on the golf course under the rating procedure.
It is expressed in strokes, so an easy par-72 golf course could have a 68.9 course rating, while the more difficult one is likely to have a rating of 74.5. In other words, an average golfer should expect to play 68.9 strokes when the course playing difficulty is rated ‘easy,’ while on a challenging course, the same golfer is expected ...
USGA introduced the slope rating measurement in the 1980s as a system of fairness directed to bogey players. Namely, they observed that a bogey golfer is likely to increase the number of strokes considerably more when playing on a course with a higher level of difficulty than a scratch golfer. This led to creating a slope handicap system ...
Yes, they do. However, the course rating impacts the golfer’s index considerably more than the slope number. It often happens that players become too focused on the slope number while ignoring the golf course number.
The USGA evaluates many elements of a golf course to determine its Course Rating. Course and slope ratings are calculated by the United States Golf Association. In fact, the USGA trademarks and licenses its USGA Course Rating and USGA Course Slope Rating to the Royal Canadian Golf Association -- countries other than America ...
A typical scratch golfer, as defined by the USGA, hits 250-yard drives and can reach a 470-yard hole in two strokes. A typical female scratch golfer hits drives 210 yards and can reach a 400-yard hole in two strokes.
A Course Rating measures the difficulty of a golf course and is a crucial component in determining a player's handicap. The Slope Rating measures the difficulty of a golf course for a bogey golfer. The Course Rating and the Slope Rating typically are printed on the scorecard for a golf course.
Slope Rating is described by the USGA as demonstrating the “measurement of the relative playing difficulty of a course for players who are not scratch golfers, compared to scratch golfers”. The higher a course’s Slope Rating, the higher the expected difference of scoring between a scratch golfer and a bogey golfer.
To determine the Slope Rating for a course requires two key numbers – Course Rating and Bogey Rating. The Course Rating is the evaluation of the playing difficulty of a golf course for the scratch player (0 handicap.) The Bogey Rating is the evaluation of the difficulty of a course for a bogey player of 20-24 handicap.
113 is the average Slope Rating signifying a course of standard relative difficulty. The number 113 is used in calculating a player’s Course Handicap. Each player with a WHS Handicap Index can calculate their Course Handicap for any course by dividing the Slope Rating of that course by 113 and multiplying that number by their Handicap Index.
The first use of slope is essentially a measure of how difficult a course is relative to others. You might be playing on a par 72, but that doesn’t make it as much of a challenge as say, Augusta National and its par 72. A slope number simply allows you to know, at least to some extent, what the difference really is.
Well this is all well and good, but how is this number calculated? Well technically, the number represents how much more difficult a given set of tees is for a bogey player in relation to scratch handicapper. You might think that this difference is fairly constant, but that isn’t the case at all.
There is obviously a deal of subjectivity in this rating. After all, golf isn’t an exact science.
This might seem relatively straightforward, at least in theory, but this is when we hit problem. Slope is also used to mean something completely different. Confusing, right? Slope is part of a variable when calculating distance as I explained in another article.
This is where our second definition of slope comes into play. You may have heard of a slope function on a rangefinder. This gives you an adjusted yardage based on the difference in elevation between where you are and where you want to go by using some fancy tech to essentially give an angle up or down which is used to adjust the distance.
A rating of slope in contrast, is a number (typically between 55 and 155) describing the relative difficulty of a course for a bogey golfer compared to a scratch golfer. A handicap of course indicates the number of strokes that a golfer receives at a particular golf course. It can be thought of as an adjustment to a golfer's handicap ...
In the United States, officially rated golf courses are described by course and rating of slope. Rating of course is a number (typically between 67 and 77) that is used to measure the average "good" score that a scratch golfer may attain on the course.
"Scratch golfers" and "bogey golfers" are terms that are often used in relation to golf handicaps. A scratch golfer is a golfer whose handicap is zero, while a bogey golfer is one whose handicap is ...
It is the number of strokes that should be deducted from a golfer's gross score to determine net score.
Since golf is a game that is played outdoors, weather or other conditions can significantly affect a player's scores. As such, in an effort to more accurately represent a player's scores, an adjustment, referred to as the Playing Conditions Calculation (PCC), based on playing conditions for the course is included. This involves factoring in a number, ranging from -1 (when conditions make the course easier) to 3 (when conditions make the course more difficult), into the score differential calculation, depending on the conditions of the course for the given day.
A golf handicap is intended as a measure of a golfer's potential playing ability. The higher the handicap of a golfer, the poorer the golfer's ability relative to that of a person with a lower handicap.
Because this adjustment is dependent on a given day, and since it is calculated automatically , it is important that players submit their scores on the actual day of play so that the PCC will be applied to their score on the correct day.