Golf Handicap Index Calculator
Your Handicap Index is the average of your best score differentials: with a full 20-round history it uses your best 8. With fewer rounds (minimum 3), fewer differentials count and a small adjustment can apply, per the World Handicap System table below.
Calculator
Enter a plus differential with its plus sign (for example +1.2).
Your handicap index: -
How many differentials count
| Rounds | Differentials used | Adjustment |
|---|---|---|
| 3 | lowest 1 | -2.0 |
| 4 | lowest 1 | -1.0 |
| 5 | lowest 1 | 0 |
| 6 | average of lowest 2 | -1.0 |
| 7 to 8 | average of lowest 2 | 0 |
| 9 to 11 | average of lowest 3 | 0 |
| 12 to 14 | average of lowest 4 | 0 |
| 15 to 16 | average of lowest 5 | 0 |
| 17 to 18 | average of lowest 6 | 0 |
| 19 | average of lowest 7 | 0 |
| 20 | average of lowest 8 | 0 |
Need a differential first? Use the score differential calculator.
Track it automatically
AGI Golf keeps your handicap index current after every round. Download it on the App Store.