USGA Callaway System

USCGA Member Handicap Index and history

USCGA Handicap Index Calculation
For each round played, the Handicap Differential is calculated as following
Handicap Differential = (Gross Score – Course Rating) * (113/Course Slope)
For those who have played 5 – 6 rounds hosted by USCGA, the Handicap Index is the lowest Handicap Differential of the 5 – 6 rounds
For those who have played 7 – 8 rounds hosted by USCGA, the Handicap Index is the average of the two lowest Handicap Differentials
For those who have played 9 – 10 rounds hosted by USCGA, the Handicap Index is the average of the three lowest Handicap Differentials
For those who have played 11 – 12 rounds hosted by USCGA, the Handicap Index is the average of the four lowest Handicap Differentials
For those who have played 4 rounds hosted by USCGA, the Handicap Index is the lowest Handicap Differential * 0.95
For those who have played 3 rounds hosted by USCGA, the Handicap Index is the lowest Handicap Differential * 0.9
For those who have played 2 rounds hosted by USCGA, the Handicap Index is the lower Handicap Differential * 0.85
For those who have played one round hosted by USCGA, the Handicap Index is the Handicap Differential * 0.8
For those who have played 4 rounds or less hosted by USCGA and wish to protest the Handicap Index calculated by USCGA, the member can provide USGA official Handicap Index. USCGA will use the average of the two Handicap Indexes.

USGA Definition
Handicap Index: Handicap Index (Handicap) is the mark which is used to indicate a measurement of a player’s potential scoring ability on a course of standard playing difficulty. Handicap = ((Average of lowest X Handicap Differentials of the most recent Y scores) * 0.96) (truncated to tenth)