Guides
What Are Course Rating and Slope? How They Turn Your Handicap Into Strokes
Course rating is the score a scratch golfer (a 0.0 Handicap Index) is expected to shoot from a specific set of tees under normal conditions, such as 71.8. Slope rating measures how much harder that same course plays for a bogey golfer than for a scratch golfer, on a scale from 55 to 155, where 113 is standard. Together they turn your Handicap Index into a Course Handicap with this formula: Handicap Index × (Slope Rating ÷ 113) + (Course Rating − Par).
Those two numbers on the bottom of the scorecard do a lot of work. They're the reason a 15-handicap gets more strokes at a tough championship course than at the local muni, and they're what lets golfers of different skill levels compete fairly. Below is what each number means, how they're set, and a step-by-step example you can use the next time you tee it up.
What Is Course Rating in Golf?
Course rating is the expected score for a scratch golfer playing a given set of tees under normal course and weather conditions. It's written in strokes to one decimal place, like 69.4 or 73.1.
Course rating is not the same as par. Par is the number of strokes an expert is expected to need hole by hole. Course rating reflects how hard the course actually plays. A par-72 course with long carries, firm greens and lots of water might have a course rating of 74.5. A short, open par-72 might be rated 68.9.
Every set of tees gets its own rating, so the blue tees and the white tees at the same course will have different numbers. Ratings are also set separately for men and women from the same tees.
What Is Slope Rating in Golf?
Slope rating tells you how much harder a course plays for a bogey golfer than for a scratch golfer. The USGA defines a bogey golfer as a player with a Handicap Index of about 20.0 for men and about 24.0 for women.
The lowest possible slope rating is 55 and the highest is 155.
A course of standard difficulty has a slope rating of 113.
The higher the slope, the more strokes a higher-handicap golfer will tend to lose there compared to a scratch player.
The name comes from math class. If you plot expected scores against handicap, slope is the steepness of that line. On a high-slope course, scores climb faster as handicaps go up, because trouble like forced carries, thick rough and narrow fairways hurts a bogey golfer more than a scratch golfer.
What's the Difference Between Course Rating and Slope?
Course Rating | Slope Rating | |
|---|---|---|
Who it's for | Scratch golfer (0.0 Handicap Index) | Bogey golfer vs. scratch golfer |
What it measures | Expected score from a set of tees | Relative difficulty for higher handicaps |
How it's written | Strokes, one decimal (e.g., 71.8) | Whole number from 55 to 155 (113 = standard) |
What it does in the formula | Adjusts for the course playing above or below par | Scales your Handicap Index up or down |
The short version: course rating tells you how hard the course is for the best players, and slope tells you how much harder it gets for everyone else.
How Are Course Rating and Slope Determined?
Trained raters from authorized golf associations evaluate each set of tees. They start with effective playing length, which is the measured yardage adjusted for roll, wind, elevation changes, altitude, doglegs and forced layups.
They then score 10 obstacle factors on every hole, for both the scratch player and the bogey player:
Topography
Fairway
Green target
Recoverability and rough
Bunkers
Crossing obstacles
Lateral obstacles
Trees
Green surface
Psychology
From that work they produce the course rating (scratch) and a bogey rating (the expected score for a bogey golfer). Slope comes from the gap between the two: the bigger the difference between bogey rating and course rating, the higher the slope.
How Course Rating, Slope and Handicap Index Combine: A Worked Example
Under the World Handicap System, your Handicap Index travels with you. When you play, it's converted to a Course Handicap for the tees you choose:
Course Handicap = Handicap Index × (Slope Rating ÷ 113) + (Course Rating − Par)
Here's how it works for a golfer with a 14.2 Handicap Index choosing between two sets of tees on a par-72 course.
Back tees: Course Rating 71.8, Slope 131, Par 72
Divide slope by 113: 131 ÷ 113 = 1.159
Multiply by the Handicap Index: 14.2 × 1.159 = 16.46
Add course rating minus par: 71.8 − 72 = −0.2, so 16.46 − 0.2 = 16.26
Round to the nearest whole number: Course Handicap 16
Middle tees: Course Rating 69.4, Slope 122, Par 72
122 ÷ 113 = 1.080
14.2 × 1.080 = 15.33
69.4 − 72 = −2.6, so 15.33 − 2.6 = 12.73
Round: Course Handicap 13
Same golfer, same day, same course, and a three-stroke difference. The back tees play longer and steeper, so the formula gives more strokes to keep the competition fair.
From Course Handicap to Playing Handicap
In many formats, one more step applies a handicap allowance. For individual stroke play, the recommended allowance is 95%. Using the unrounded back-tee number: 16.26 × 0.95 = 15.45, which rounds to a Playing Handicap of 15. Match play, four-ball and team formats use different allowances, so check what your event or club uses.
Playing 9 Holes
For a 9-hole round, halve your Handicap Index (rounded to one decimal), then use the 9-hole course rating, slope and par in the same formula. A 14.2 index becomes 7.1 for nine holes.
How Course Rating and Slope Work in Reverse: The Score Differential
Course rating and slope also work in the other direction, turning the score you shoot into a number that can be compared across courses. That number is the Score Differential:
Score Differential = (113 ÷ Slope Rating) × (Adjusted Gross Score − Course Rating − Playing Conditions Calculation)
Say our 14.2 golfer shoots an adjusted 88 from the back tees (71.8 / 131) on a day with no playing-conditions adjustment:
(113 ÷ 131) × (88 − 71.8 − 0) = 0.863 × 16.2 = 13.97, or 14.0
Under the World Handicap System, a Handicap Index is the average of the lowest 8 Score Differentials from your most recent 20. That's why an 88 at a hard course can count more toward your handicap than an 85 at an easy one.
Where to Find a Course's Rating and Slope
The scorecard. Most courses print the course rating and slope for each set of tees, usually as "71.8/131."
The first tee or pro shop. Many clubs post a Course Handicap table so you can look up your strokes without doing the math.
The USGA National Course Rating Database. You can search rated courses at ncrdb.usga.org.
Tracking Your Handicap With SwingU
If you don't carry an official Handicap Index yet, the free SwingU app is an easy way to start keeping track. Score a round on the digital scorecard and you'll get a SwingU Handicap Estimate after just 9 holes, at no cost and with no subscription. Like the official system, the SwingU Handicap Estimate uses the course rating and slope of the course you play, so it takes into account how hard that course is. Handicap-adjusted scoring and scorecard games like Stroke Play, Stableford, Nassau, Match Play and Skins are free too, which helps when your group has a mix of skill levels.
The SwingU Handicap Estimate is a free estimate, not an official USGA handicap or Handicap Index. If you play in events that require an official handicap, you'll need one through a club or an authorized golf association.
If you want to go further than one number, SwingU Pro adds a relative handicap for each part of your game (driving, approach, chip/pitch, sand and putting), so you can see which skill is costing you the most strokes. Our guide to how strokes gained works explains the stats behind it, and SwingU Plus vs. Pro breaks down what each plan includes.
Frequently Asked Questions
What is a good slope rating for a golf course?
There's no "good" or "bad" slope, only easier or harder. A slope of 113 is standard difficulty. Slopes above 113 play harder than average for bogey golfers, and slopes below 113 play easier. The full range is 55 to 155.
Is a higher slope rating harder?
Yes, for golfers who aren't scratch players. A higher slope means scores rise faster as handicaps go up, so a higher-handicap golfer gets more strokes on a high-slope course.
Can course rating be higher than par?
Yes. If a course plays harder than its par suggests for a scratch golfer, its course rating will be above par, like 74.2 on a par 72. In the Course Handicap formula, that adds strokes. A rating below par takes strokes away.
What is the difference between course rating and bogey rating?
Course rating is the expected score for a scratch golfer. Bogey rating is the expected score for a bogey golfer (a Handicap Index of about 20.0 for men and 24.0 for women). The gap between them determines the slope rating.
Why do different tees have different ratings?
Each set of tees changes the playing length and which hazards come into play, so each one is rated separately. Men's and women's ratings are also set separately from the same tees.
Do I need course rating and slope to play a casual round?
No. You only need them to work out a Course Handicap or post a score for handicap purposes. Most apps and Course Handicap tables at the course do the math for you.
Does the SwingU Handicap Estimate use course rating and slope?
Yes. The SwingU Handicap Estimate uses course rating and slope, so a round on a harder course is accounted for. You get it free after scoring 9 holes. It's an estimate, not an official USGA handicap or Handicap Index.
Is the SwingU Handicap Estimate the same as a Handicap Index?
No. The SwingU Handicap Estimate is a free estimate you get in the SwingU app after scoring 9 holes. It's useful for tracking progress and setting up handicap-adjusted games with friends, but it isn't an official USGA handicap or Handicap Index.
The Bottom Line
Course rating tells you what a scratch golfer should shoot from your tees. Slope tells you how much harder the course gets for everyone else. Plug both into Handicap Index × (Slope ÷ 113) + (Course Rating − Par) and you'll know exactly how many strokes you get. If you're still building toward an official handicap, download SwingU free and get your SwingU Handicap Estimate after your first 9 holes.