Why Two Ratings Are Necessary
If you look at any physical golf scorecard, next to each set of tees (Blue, White, Red, etc.), you will see two key numbers: Course Rating (e.g., 71.4) and Slope Rating (e.g., 128). While many casual golfers assume these numbers measure the same thing, they actually evaluate two entirely different aspects of course difficulty.
What Is Course Rating?
Course Rating evaluates the difficulty of a golf course for a scratch golfer (someone with a 0.0 Handicap Index) under normal weather conditions. It is expressed as a decimal score relative to par.
For example, if a course has a Par of 72 but a Course Rating of 73.8 from the back tees, a scratch golfer is expected to shoot around a 74 on an average day. If the rating is 69.5, the course plays noticeably easier than par for skilled players.
What Is Slope Rating?
Slope Rating evaluates how much harder the course plays for a bogey golfer (roughly a 20 to 24 handicap for men, 24 for women) compared to a scratch golfer. It measures the relative steepness of difficulty increase as a player's skill level drops.
- Standard Slope Rating: 113 (considered an average difficulty course for the target demographic).
- Minimum Slope: 55 (extremely flat, wide, and forgiving).
- Maximum Slope: 155 (extremely punitive with tight hazards, deep rough, and long carries).
How They Work Together in Your Handicap
When you log a score into our Handicap Tracker, both numbers are factored into the World Handicap System formula:
(Score - Course Rating) × (113 ÷ Slope Rating)
Without Slope Rating, a high-handicap player who shoots a 90 on a tight, heavily bunkered mountain course would receive the same differential credit as shooting a 90 on a flat, wide-open municipal course. Slope ensures fairness across all skill levels.