Course Rating and Slope Rating Explained

Look at almost any scorecard and you will see two numbers next to each set of tees, such as 72.4 / 131. They are the Course Rating and the Slope Rating, and together they describe how difficult the course is from those tees. They are the backbone of the World Handicap System, used in the United States and most of the golfing world since 2020, and they are the best objective guide to how hard a course will play before you set foot on it.

Course Rating

The Course Rating is the score a scratch golfer, a player with a Handicap Index of 0.0, is expected to shoot from a given set of tees under normal course and weather conditions. It is shown to one decimal place.

A Course Rating close to par means the course plays roughly as its par suggests for an expert. A rating well above par, say 74.8 on a par-72 course, means even very good players should expect to struggle. Each set of tees has its own rating, because the same course is a very different test from the back tees than from the forward ones.

Slope Rating

The Slope Rating measures something different: how much harder the course is for a bogey golfer than for a scratch golfer. A bogey golfer, for rating purposes, is a player with a Handicap Index of around 20 for men or 24 for women.

Slope Ratings run from 55 to 155, and 113 is the standard. A high slope means the course punishes the mistakes that average golfers make: long carries over water, narrow fairways, deep bunkers, thick rough. Two courses can share the same Course Rating but have very different slopes; the one with the higher slope will cost a typical golfer more strokes.

How Courses Are Rated

Ratings are not guesses. In the United States, trained teams from the state and regional golf associations visit each course and measure it against the USGA Course Rating System. They start from the effective playing length of each hole: not just the yardage, but how far it actually plays once roll, elevation changes, doglegs, forced lay-ups, prevailing wind and altitude are taken into account. They then rate the obstacles, including bunkers, penalty areas, trees, rough, and the size and difficulty of the greens.

Altitude is part of the calculation because the ball flies farther in thin air, so a course at high elevation plays shorter than its yardage. Our course pages estimate the same effect for each tee time, from the course's elevation and the forecast temperature and humidity.

From Handicap Index to Course Handicap

Your Handicap Index is portable: it measures your ability in general, not on any one course. Before a round, it is converted into a Course Handicap, the number of strokes you receive from the tees you are playing, with this formula:

Course Handicap = Handicap Index × (Slope Rating ÷ 113) + (Course Rating − Par)

Example: A golfer with a Handicap Index of 18.0 plays from tees rated 71.2 / 130 on a par-72 course. 18.0 × (130 ÷ 113) = 20.7, and 71.2 − 72 = −0.8, so the Course Handicap is 19.9, which rounds to 20. On a gentler course with a slope of 113, the same golfer would receive fewer strokes.

Most golf apps and course websites do this calculation for you, but it shows why the slope matters: the harder the course is for average golfers, the more strokes you get.

When the Weather Changes the Rating

Ratings assume normal conditions. On a day when strong wind, heavy rain or cold makes the course play much harder than usual, scores rise for everyone. The World Handicap System handles this with the Playing Conditions Calculation (PCC): after each day's play, it compares the scores submitted with what was expected. If they are unusually high or low, it adjusts that day's score differentials by between −1 and +3 strokes. A tough, windy day then does not unfairly push up your Handicap Index.

Choosing the Right Tees

The ratings also help you pick the right tees. A widely used rule of thumb comes from Tee It Forward, a 2011 program of the USGA and the PGA of America: match the total length of the course to your average driving distance. Its chart suggests about 6,200 to 6,400 yards for a golfer who drives 250 yards, 5,800 to 6,000 yards for 225 yards, and 5,200 to 5,400 yards for 200 yards. A golfer who drives 225 yards will usually enjoy those tees far more than the 6,800-yard back tees. Playing the right tees means more greens reached in the intended number of shots, faster rounds and lower scores.

Getting Started

Next time you book a round, look up the Course Rating and Slope Rating for the tees you plan to play, work out your Course Handicap, and check the forecast for your tee time on our golf weather pages. Wind, rain and temperature can make the same rated course play very differently from one day to the next. For more on how the parts of a hole shape its difficulty, see Parts of a Golf Course Explained.

Photo: "Perfect day on the green" by PattayaPatrol, licensed under CC BY-SA 4.0, via Wikimedia Commons. Resized from the original.