What slope rating actually means
Slope Rating is one of the most misunderstood numbers in golf. It is not a measure of how hilly a course is — it is a measure of how much harder the course plays for a higher handicapper than for a scratch golfer. Here is what it actually means, how it works with Course Rating, and why the number 113 keeps appearing in the handicap formulas.
Open the Course Handicap calculatorWant to see how a course's Slope changes your strokes? The Course Handicap calculator takes your Handicap Index, the Slope, the Course Rating and par, and returns the strokes you receive on that tee.
What Slope Rating actually is
Slope Rating is a measure of the relative difficulty of a course for a bogey golfer compared with a scratch golfer. A scratch golfer plays to a handicap of roughly zero; a bogey golfer shoots around 90 on a par-72 course. The bigger the gap between how those two players score on a course, the higher its Slope Rating.
The scale runs from 55 to 155, and 113 represents a course of standard difficulty. A course rated well above 113 punishes higher handicappers disproportionately — forced carries, deep bunkers, thick rough and fast, contoured greens hurt the bogey golfer far more than the scratch player. A course near the bottom of the scale plays almost as fairly for a weak player as a strong one.
The single most common misconception is that Slope tells you how hilly a course is. It does not. Elevation only affects Slope insofar as it changes scoring difficulty. A flat, water-lined resort course can have a very high Slope, while a hilly parkland layout with generous fairways can have a modest one.
Course Rating vs Slope Rating
Every rated tee carries two numbers, and they answer two different questions.
Course Rating is the expected score of a scratch golfer under normal conditions, expressed in strokes to one decimal place. If a tee has a Course Rating of 71.2, a scratch golfer is expected to average about 71.2 there. It tells you the absolute difficulty for a good player.
Slope Rating tells you how much harder the course gets as ability drops. Two tees can share the same Course Rating but differ in Slope: the higher-Slope tee will award more strokes to a mid- or high-handicapper, because the design penalises weaker play more steeply. In short, Course Rating sizes the challenge for the best players, and Slope stretches that challenge to everyone else.
Why 113 is in the formula
113 is the Slope Rating of a course of standard relative difficulty — the reference point the whole system is calibrated against. Because a Handicap Index is portable, you convert it into a Course Handicap for the specific tee you play, and Slope is what scales it:
- Handicap Index
- your portable measure of demonstrated ability
- Slope Rating
- relative difficulty for a bogey golfer on the tee played, 55–155
- 113
- the Slope Rating of a course of standard difficulty
- Course Rating
- expected score of a scratch golfer on the tee, in strokes
- Par
- the par of the tee being played
The ratio Slope / 113 is the engine. When Slope equals 113 the ratio is 1, so your
Course Handicap tracks your Index directly. A higher Slope pushes the ratio above 1, so the same
Index earns more strokes; a lower Slope earns fewer. That is exactly the intended
behaviour: harder courses give higher handicappers more shots to keep competition fair.
The effect of Slope on strokes
To make the ratio concrete, here is a golfer with a Handicap Index of 15.0 playing tees where Course Rating − Par = 2, across a range of Slope Ratings. Course Handicap is rounded to the nearest whole number.
| Slope Rating | 15.0 × (Slope / 113) | + (CR − Par) | Course Handicap |
|---|---|---|---|
| 95 | 12.6 | +2 | 15 |
| 113 | 15.0 | +2 | 17 |
| 125 | 16.6 | +2 | 19 |
| 140 | 18.6 | +2 | 21 |
| 155 | 20.6 | +2 | 23 |
The same 15.0 Index becomes anything from 15 to 23 strokes depending only on the Slope. That eight- stroke swing is the whole point of the system: it lets a fixed measure of ability travel between courses of very different difficulty.
Who sets Slope Rating?
Slope Rating and Course Rating are set by an authorised course-rating team using the USGA Course Rating System, which measures effective playing length and ten obstacle factors for both the scratch and bogey player. You cannot calculate a valid Slope yourself, and only rated tees carry official Slope and Course Rating values. Treat them as inputs you read from the scorecard, not numbers you derive.
Frequently asked questions
Does high slope mean a hilly course?
No. Slope Rating measures how much harder a course plays for a bogey golfer than a scratch golfer, driven by factors such as forced carries, hazards, rough and green difficulty. Hilliness only matters if it affects scoring; a flat course can have a high Slope and a hilly one a low Slope.
What is a normal Slope Rating?
The scale runs from 55 to 155, and 113 represents a course of standard relative difficulty. Many everyday courses sit somewhere between 110 and 135 depending on the tee.
Can I calculate my own Slope Rating?
No. Slope Rating and Course Rating are set by an authorised course-rating team using the USGA Course Rating System. Only rated tees carry valid values, which you use as inputs rather than compute yourself.
Related tools and reading
Course Handicap calculator
Enter your Index, the Slope, Course Rating and par to see the strokes you receive on the tee.
ReadCourse Handicap vs Handicap Index
How your portable Index becomes the day's playing number, and why they differ.
Sources
- USGA, Course Rating and Slope Rating System — definition of Slope Rating (55–155, 113 standard) and the scratch/bogey golfer basis. Checked 24 Aug 2026.
- USGA & The R&A, WHS Rules of Handicapping — Course Handicap formula and the role of the 113 reference value. Checked 24 Aug 2026.