How is a Handicap Index calculated?

Handicap Index calculation

A Handicap Index is the player’s demonstrated playing ability and is based on scores relative to the course and tees played during posted rounds. 

A Handicap Index can be calculated with as few as 54 holes worth of posted scores. With 20 posted scores, your 8 best rounds are used. When less than 20 18-hole rounds are posted, a fewer number of scores are used to calculate your handicap Index. 

If you have further questions about the formulas for Handicap Index see: Rule 5, Handicap Index Calculation, Rules of Handicapping.