A walkthrough, end to end.
- 1
Enter score differentials for each round (up to 20 most recent).
- 2
The calculator averages the lowest N (per WHS table) and applies a 0.96 modifier when applicable.
- 3
See your handicap index.
Handicap index
Differential = (113 / slope) × (score − rating − PCC). Index = average of lowest N of last 20 differentials.
What you can do with this.
Track improvement
See your index update after each round.
Tournament eligibility
Confirm you meet entry index thresholds.
Match negotiations
Compare indexes to set match strokes.
Course handicap
Use index × slope/113 for course handicap.
Self-coaching
Watch trend over the season.
Frequently asked.
WHS uses your best 8 of the last 20. Fewer rounds use a sliding scale; minimum 3 rounds.
(113 / Slope) × (Adjusted Gross Score − Course Rating − PCC).
No. All math runs in your browser.
WHS applies a soft/hard cap on increases. Not modeled here — calculator gives raw index.