Course Handicap (CH) = (Handicap Index) X (Slope Index / 113)
Rounded Course Handicap (RCH) = Integer Part of (CH + 0.5)
Playing Handicap = (CH or RCH)* X (Adjustment %)
… then rounded to the nearest integer.

*Notes:

1. At startup Slope Ratings in the calculator are: White 130, Yellow 125 and Red 129. Adjust these to match your course.
2. Course Handicap calculation does not use the (Course Rating – Par) adjustment used in some other countries.
3. Playing Handicap depends on Format of Play, and whether National Associations choose to use the unrounded or rounded value of Course Handicap. For ‘CH To Use’ in England, Wales and Northern Ireland choose ’Rounded’ (the default), for Scotland choose ‘Unrounded’. For any other country you will need to refer to local guidance.
4. For general, non-competition play use your Course Handicap. In competitions, Playing Handicap will determine the result, while your Course Handicap will determine the score used for updating your Handicap Index. Be mindful of your Course Handicap when deciding whether to pick up on a hole.
5. You can create a shortcut to this webpage on your phone home screen, making it look like an App. Read how to do that here.
6. This page uses Cookies to store your entered values for: handicap index and slope values. This is so that when you return to the page it will display with the last values you set. No personal information is stored.