Golf Handicap: What One Round Says About Your Index
A handicap differential adjusts your score for how hard the course played. This calculator shows that single-round number plainly.
What is the Golf Handicap Calculator?
Enter your adjusted gross score, the course rating, and the slope rating. The tool applies the standard differential formula. This is a simplified single-round estimate: an official handicap index uses the best 8 of your last 20 differentials, so treat this as a guide, not an official index.
How to use it
- Enter your adjusted gross score.
- Enter the course rating and slope.
- Click Calculate Handicap.
Worked example
A score of 90 on a course rated 72 with slope 130 gives a differential of (90-72) x 113/130 = about 15.65.
What differential is 90 on a 72-rated course at slope 130?
About 15.65, from (90 - 72) x 113 / 130.
Frequently asked questions
Is this my official handicap?
No. An official index averages your best 8 differentials from 20 rounds.
What does slope do?
Slope scales the differential: the same score counts more on a harder-rated course.