Calculate your golf handicap index using the USGA/WHS formula. Enter recent scores, course ratings, and slope to get your official handicap and playing handicap.
The Golfer's Handicap Calculator computes your USGA/WHS (World Handicap System) handicap index from recent round scores. It turns raw scores into a portable measure of playing ability, which is what makes handicap competition possible across different courses and tee sets. That makes it easier to compare rounds without doing the differential math by hand.
Under the WHS, the handicap index is based on the best 8 of your last 20 score differentials. Each differential uses the course rating and slope rating to normalize the round, so a tough course and an easier course can be compared on the same scale. That is why the system works even when your rounds come from very different layouts.
Enter your recent rounds with course rating and slope to calculate your index, then see the course handicap for the course you plan to play next. The calculator also shows each differential and which rounds are currently counting, which makes it easier to understand how your index is being built.
Use this calculator when you want a quick handicap estimate from your recent rounds without working through the differentials by hand. It is useful for tracking progress, checking whether a posted score helps or hurts, and figuring out your course handicap before a round or tournament. It also gives you a simple way to see which recent rounds are actually driving your index.
Score Differential = (113 / Slope) × (Adjusted Gross Score - Course Rating). Handicap Index under WHS = average of the lowest applicable score differentials, rounded to one decimal. Course Handicap = Handicap Index × (Slope / 113) + (Course Rating - Par). Number of best differentials used: 3 rounds → best 1, 5 → best 1, 8 → best 2, 12 → best 4, 16 → best 6, 20 → best 8.
Result: Handicap Index: 9.2
Differentials: 11.4, 14.0, 8.7, 15.8, 10.5, 13.2, 9.6, 14.9. With 8 posted rounds, the lowest 2 differentials count: 8.7 and 9.6. Their average is 9.15, which rounds to a 9.2 Handicap Index under the WHS approach.
The WHS unified six separate handicap systems worldwide in 2020. It uses the best 8 of 20 most recent score differentials, applies a 0.96 bonus factor, and truncates to one decimal. A "playing conditions calculation" (PCC) adjusts differentials daily based on actual scores relative to expected performance. Safeguards prevent sandbagging: extraordinary upward movement triggers a committee review.
Each round produces a differential: (113/Slope) × (Adjusted Score - Course Rating). The 113 normalizes all differentials to a "standard difficulty" course. A scratch golfer on a course with 72.0 rating and 113 slope who shoots 72 has a 0.0 differential. The same golfer shooting 72 on a 72.0/140 slope course has a differential of -0.0 — because the slope adjustment accounts for the extra difficulty.
Course Handicap = Index × (Slope/113) + (CR - Par). A 15.0 index on a 140-slope course gets: 15 × (140/113) + 0 = 18.6, rounded to 19. In match play, playing handicap = course handicap difference × allocation percentage (typically 100% for match play, 95% for individual stroke play). Strokes are distributed based on the hole handicap allocation on the scorecard.
Minimum 3 rounds (uses best 1 differential - 2.0). With 20 rounds, the system uses the best 8 of 20 differentials for the most accurate handicap. More rounds = more stable handicap. New rounds replace the oldest when you have 20.
Slope rating (55-155, average 113) measures how much harder a course is for a bogey golfer relative to a scratch golfer. A high slope (140+) means the course punishes high-handicappers more. A low slope (100) means the difficulty gap is smaller. It's NOT overall course difficulty — that's the course rating.
No. The old USGA system applied a 0.96 "bonus for excellence," but the modern World Handicap System uses the average of your lowest score differentials without that extra multiplier.
Under the WHS, apply Equitable Stroke Control (ESC) or Net Double Bogey adjustment: the maximum score on any hole is double bogey plus any handicap strokes received on that hole. This prevents blow-up holes from inflating your handicap. Also apply any local rule adjustments.
Yes! That's the beauty of the handicap system. Each round's differential normalizes the score against that course's rating and slope. You can mix rounds from different courses, and your handicap index remains an accurate measure of your ability across all courses.
The average male golfer's handicap is about 14-16; average female is about 27-28. Single-digit (under 10) is considered good. Scratch (0) means you shoot roughly par. Plus handicaps (negative) indicate you typically beat par. Tour professionals would be roughly +4 to +8.