## 6.1a For an 18-hole RoundAn 18-hole Course Handicap is calculated as follows:
Note: An 18-hole
## 6.1b For a 9-hole RoundA 9-hole Course Handicap is calculated as follows:
(See Appendix E: Stroke Index Allocation for guidance on stroke index allocation for 9-hole rounds.) |

Rule 6.1b Interpretations: |
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6.1b/1 – Use of 9-Hole Course and Slope Ratings in the Calculation of a 9-hole Course Handicap When an Authorized Association issues Course Ratings and Slope Ratings to Golf Clubs, the 18-hole ratings should also be presented with front nine and back nine Course Ratings and Slope Ratings. For example:
The calculation of a 9-hole Course Handicap must use the correct Slope Rating for the 9-hole golf course being played. |

Note: The calculated 18-hole and 9-hole Course Handicap is rounded to the nearest whole number, with .5 rounded upwards, for the purpose of:

- Applying adjustments for maximum hole score (see Rule 3.1 Maximum Hole Score for Handicap Purposes) and when a hole is not played (see Rule 3.2 When a Hole is Not Played).
- Where applicable, calculating a
*Score Differential*.

Otherwise, the full calculated value is retained and rounding occurs only after the Playing Handicap calculation.