Golf Handicap Calculator
Calculate your approximate golf handicap index based on your recent scores. Enter your scores along with the course rating and slope rating to get your handicap differential and estimated index. Uses a simplified version of the USGA World Handicap System.
A golf handicap is a number representing your playing ability — specifically, the strokes above par you typically shoot on courses of standard difficulty. Lower is better. A "scratch" golfer has a handicap of 0; the average male handicap is about 14, and the average female handicap is about 27. The handicap exists so golfers of different skill levels can compete on equal terms: in match play, the higher-handicap player gets strokes equal to the difference.
This calculator estimates your handicap index using a simplified version of the USGA / R&A World Handicap System (WHS), which became the global standard in 2020. Enter recent scores along with the course rating and slope rating from each scorecard, and the calculator returns your handicap differentials and an estimated handicap index.
This is an estimate, not an official handicap. Official handicaps require posting scores through an authorized golf association (USGA in the U.S. via GHIN, R&A elsewhere) on rated courses, and the WHS algorithm uses your best 8 differentials from your most recent 20 rounds. With fewer than 20 rounds, the system uses fewer differentials by a published table.
Inputs
Found on the scorecard, typically 67-77
Found on the scorecard, typically 100-150
Results
Handicap Index
13.5
Skill Level
Good
Avg Score
90.4
Round Differentials
| Round | Score | Differential |
|---|---|---|
| 1 | 92 | 18.1 |
| 2 | 88 | 14.5 |
| 3 | 95 | 20.8 |
| 4 | 90 | 16.3 |
| 5 | 87 | 13.6 |
Handicap Summary
| Detail | Value |
|---|---|
| Average Score | 90.4 |
| Course Rating | 72.0 |
| Slope Rating | 125 |
| Best Differential | 13.6 |
| Differentials Used | Best 2 of 5 |
| Handicap Index | 13.5 |
| Skill Level | Good |
Formula
How to use this calculator
- Enter at least 3 recent 18-hole scores. More rounds give a better estimate.
- Enter the course rating from the scorecard for the tees you played. Course rating is published per tee set.
- Enter the slope rating from the same scorecard.
- For 9-hole rounds, double the score, course rating, and use the same slope.
- For an official handicap, post scores through your local golf association (GHIN in the U.S.) — this calculator is an estimate, not a substitute.
Worked examples
Mid-handicap golfer
5 recent scores: 92, 88, 95, 90, 87 Course rating 72.0, slope 125 Lowest differential: ~13.6 Estimated handicap: 13.6 This player would receive about 14 strokes in a match against a scratch golfer.
Beginner
5 scores: 105, 110, 102, 108, 99 Course rating 71.5, slope 125 Lowest differential: (99−71.5)×113/125 = 24.86 Estimated handicap: 24.9 The cap on handicap index is 54.0 for both men and women under the WHS, so even very high scores produce a usable handicap.
When to use this calculator
Use this for casual handicap tracking, evaluating tournament eligibility, or seeing where you stand relative to other amateurs. For official tournament play, USGA-handicap or R&A-handicap status is required and is established only through scores posted via an authorized service.
The full WHS algorithm includes additional adjustments this calculator doesn't apply: - Soft cap (5-stroke cushion above your low index) - Hard cap (8-stroke max above low index) - Exceptional Score Reduction (downward adjustment after very low scores) - Net Double Bogey adjustment per hole
For the actual computation, use a USGA GHIN account (in the U.S.) or your national golf association's service.
Common mistakes to avoid
- Posting scores from courses without official ratings. The math requires both course rating and slope.
- Using gross scores from the wrong tees. Course and slope ratings differ by tee set; use the rating for the tees you actually played.
- Forgetting Net Double Bogey. In WHS, the maximum any single hole can score for handicap purposes is double bogey + handicap strokes received on that hole.
- Using an outdated USGA handicap formula. The pre-2020 formula is no longer in use globally.
- Treating the calculator as an official handicap. It's a directional estimate; tournaments require an official index.
Frequently Asked Questions
Sources & further reading
- World Handicap System — United States Golf Association
- WHS rules of handicapping — R&A