1. What is a USGA Score Differential?

Definition: The Score Differential measures the performance of a round relative to the difficulty of the course, adjusted for playing conditions.

Purpose: It's used in the World Handicap System to calculate a golfer's handicap index by comparing scores across different courses.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( SD \) — Score Differential (dimensionless)
• \( AS \) — Adjusted Score (gross score adjusted for net double bogey maximum)
• \( CR \) — Course Rating (expected score for a scratch golfer)
• \( SR \) — Slope Rating (measure of course difficulty for bogey golfers relative to scratch golfers)

Explanation: The difference between your score and the course rating is scaled by the standard slope rating (113) and divided by the actual slope rating.

3. Importance of Score Differential

Details: This calculation allows for fair comparison of scores across different courses and tees, enabling an accurate handicap system.

4. Using the Calculator

Tips: Enter your adjusted score (after applying net double bogey limits), the course rating, and slope rating (default 113). Slope must be between 55-155.

5. Frequently Asked Questions (FAQ)

Q1: Why is 113 used in the formula?
A: 113 is the standard slope rating, representing a course of average difficulty. It serves as the baseline for calculations.

Q2: How do I get my adjusted score?
A: Start with your gross score, then apply net double bogey maximums to any holes where you exceeded this limit.

Q3: Where can I find course and slope ratings?
A: These are typically posted on the scorecard or available from the golf course staff.

Q4: What's a good score differential?
A: Lower is better. A differential of 0 would mean you played to the course rating (scratch golfer level).

Q5: How many differentials are used for a handicap?
A: The best 8 of your most recent 20 score differentials are used to calculate your handicap index.