Course Handicap and Playing Handicap calculations

Course and Playing Handicaps are calculated in Golf GameBook according to World Handicapping System specifications.

Content:
Course Handicap
Playing Handicap
Examples
Example1: Playing Handicap - Individual with 100% Handicap Allowance
Example2: Playing Handicap - Individual with other than 100% Handicap Allowance
Example3: Playing Handicap - Team /Same Handicap Allowance for all players in the team

Practical Tip
Regional Exceptions


Course Handicap

This exact decimal number is calculated from specific course and tee values for each individual player. It's used in calculations and usually not visible anywhere.

Course Handicap = Handicap Index x (Slope Rating / 113) + (Course Rating - par)
The unrounded result is then used to calculate a Playing Handicap

Playing Handicap

This is always a whole number and shown to players when handicaps are applied to the scoring.

Playing Handicap = Course Handicap x handicap allowance %
The result of this calculation is rounded up to the nearest whole number.


Examples of how Playing Handicap is counted


Values used in examples:
John Doe (Man) hcp 12,5
Amanda Jones (Woman) hcp 7,2
Playing at course where Total par is 72
For Men at white tee Cr 71,3 and Slope 138
For Women at red tee Cr 71,4 and Slope 124

Course Handicap

John Doe 12,5 x (138 / 113) + (71,3-72) = 14,5654867
Amanda Jones 7,2 x (124/113) + (71,4-72) = 7,30088496

Example1: Playing Handicap - 100% Handicaps allowed

This is the most common way to use Playing Handicaps and in it's simplest form means that Course Handicaps are just rounded up.

Amanda and John are playing individual games with full (100%) handicaps allowed.
Playing Handicap = Course Handicap x handicap allowance %
John Doe 14,5654867 x 1 = 14,5654867 this is now rounded up to nearest whole number 15.
Amanda Jones 7,30088496 x 1 = 7,30088496 -> 7.

Playing Handicaps with 100% Handicap allowed are:
John Doe 15
Amanda Jones 7


Example2: Playing Handicap - Individual with other than 100% Handicap Allowance

Amanda and John are playing Stableford game where 75% of Handicaps are allowed.

Playing Handicap = Course Handicap x handicap allowance %
John Doe 14,5654867 x (75/100) = 10,924115 rounded up to 11
Amanda Jones 7,30088496 x (75/100) = 5,47566372 rounded up to 5

Playing Handicaps with 75% Handicaps allowed are:
John Doe 11
Amanda Jones 5

 

Example3: Playing Handicap - Team / Same Handicap Allowance for all players in the team

Amanda and John are playing as team in Two-Man Scramble tournament where 25% of handicaps are allowed.
John Doe 14,5654867 x (25/100) = 3,64137168
Amanda Jones 7,30088496 x (25/100) = 1,82522124
These are added up 3,64137168 + 1,82522124 = 5,46659292 and rounded up to nearest whole number 5.

Playing Handicap for Team Amanda and John is 5.

 

Practical Tip

Players are often finding their Playing Handicaps from ready made charts at club house.
Numbers found from these charts are rounded up Playing Handicaps, not Course Handicaps and should not be used for any counting!

If for example the Two-Man Scramble Team Playing Handicap would be counted with these Rounded Up values:
John Doe 15 x (25/100) = 3,75
Amanda Jones 7 x (25/100) = 1,75
When these are added up result is = 5,5 which is rounded up to 6 and this is not same as correct Team PHCP 5.

 

REGIONAL EXCEPTIONS:

Within the launch of WHS R&A made some local rulings, which means that the CR-par isn’t implemented into their regional WHS-calculations. Therefore, our system also calculates the playing handicaps based on the following formula in the UK
Course Handicap = hcp index x slope rating / 113



Please also note that Scotland chose not to utilise this formula and instead, chose to use the default WHS -calculation formula
Course Handicap = hcp index x (slope rating / 113) + (CR - par)


Australia’s Golf Federation chose to add an additional multiplier of 0.93 into their WHS-calculations. Therefore, the playing handicaps are calculated based on this formula within our system
Course Handicap = (hcp index x (slope rating / 113) + (CR - par)) x 0.93

 

More about Course and Playing Handicap calculation rules in here.

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