Handicap Index is the measure used in Golf game to estimate the player's potential. It is calculated based on the USGA course slope and course rating. This online tutorial helps to learn how to calculate the golf handicap index.

Handicap Index can be calculated using the USGA (United States Golf Association) Slope and Course Rating.

A golf player attends 5 rounds and his adjusted gross scores are 75, 73, 80, 85, 90 and the USGA Course rating is 61.2,60, 68, 71, 67 slope rating is 110, 113, 117, 130, 121.
**Step 1 : **
Find the player's handicap differential,
For 1st round = [(75 - 61.2) x 113] / 110
Round #1 = [13.8 x 113] / 110
= 14.17
For 2nd round = [(73-60) x 113] / 113
Round #2 = 13
For 3rd round = [(80-68) x 113]/117
Round #3 = 11.59
For 4th round = [(85-71)x113] / 130
Round #4 = 12.17
For 5th round = [(90-67) x 113 ] / 121
Round #5 = 21.48
Therefore the handicap differential values are : 14.17, 13, 11.59, 12.17, 21.48.
**Step 2 :**
To find the golf handicap index,
Arrange the handicap differentials of all rounds in ascending order : 11.59, 12.17, 13, 14.17, 21.48.

**Step 3 :**
Find the number of differentials used based on the rounds entered. You can use the below table to find the number of differentials.

Rounds Entered | Differentials Used |
---|---|

5-6 | 1 lowest |

7-8 | 2 lowest |

9-10 | 3 lowest |

11-12 | 4 lowest |

13-14 | 5 lowest |

15-16 | 6 lowest |

17 | 7 lowest |

18 | 8 lowest |

19 | 9 lowest |

20 | 10 lowest |

In this example, the player has entered for 5 rounds and hence, the number of differentials is 1.

So, the differential value here is 11.59

Hence, Sum of differentials = 11.59

**Step 4 :**
Substituting the values in the Golf Handicap index (HI) formula,
HI = (11.59 / 1) x 0.96
HI = 11.1264
Hence, you can use this tutorial to learn how to calculate golf handicap index.