Golf Handicap Differential Calculator
Calculate your golf score differential and World Handicap System (WHS) handicap index.
Enter up to 8 recent scores to get your official handicap calculation.
Golf Handicap Index
World Handicap System (WHS) Formula
Score Differential = (Adjusted Gross Score − Course Rating) × 113 ÷ Slope Rating
Handicap Index is calculated from the best differentials in your last 20 rounds:
- With 20 rounds: average of best 8 differentials × 0.96
- With fewer rounds, fewer differentials are used (see WHS table)
Course Rating — the expected score for a scratch golfer on that course. Slope Rating — difficulty relative to a bogey golfer (standard = 113).