A score differential measures one round's performance relative to the course's difficulty. The formula is (adjusted gross score − course rating) × 113 ÷ slope rating. The 113 is the slope of a course of standard difficulty, so dividing by your course's slope makes differentials comparable between venues. Your Handicap Index is built from your best differentials.
Key points
- (Score − course rating) × 113 ÷ slope
- 113 = standard course slope
- Makes rounds comparable across courses
- Best differentials form your index
Try the tool
Put this into practice with our free calculator.
Open the Score Differential Calculator →