Golf Handicap Calculator - Course Handicap & USGA WHS Index
Free online golf handicap calculator. Calculate exact Course Handicap and Playing Handicap strokes for any golf course tee box using Slope Rating and Course Rating, or compute your official World Handicap System (WHS) Handicap Index from 20-round score differential history.
Golf Handicap & Course Handicap Calculator (USGA WHS)
Compute Course Handicap strokes for any tee box or calculate official World Handicap System (WHS) index from score history.
Tee & Player Parameters
USGA WHS Formula
Course Handicap = [Handicap Index × (Slope Rating / 113)] + (Course Rating - Par)
This ensures fair competitive play across courses with differing difficulties and par ratings.
Golf Handicap & Course Handicap Guide: USGA World Handicap System (WHS), Slope & Rating Mechanics
The USGA and R&A World Handicap System (WHS) allows golfers of differing abilities to compete fairly on any golf course worldwide. This guide explains how Course Handicap strokes and 20-round Score Differentials are calculated.
World Handicap System (WHS) Formulas
Score Differential: Differential = (113 / Slope Rating) × (Adjusted Gross Score - Course Rating)
Course Handicap: Course Handicap = Handicap Index × (Slope Rating / 113) + (Course Rating - Par)
Playing Handicap = Course Handicap × Handicap Allowance %
- Slope Rating: Measures relative course difficulty for a bogey golfer vs a scratch golfer (Standard = 113; Range: 55 to 155).
- Course Rating: Measures expected score for a scratch golfer under normal course conditions.
Step-by-Step Instructions
Enter 18-Hole or 9-Hole Scores
Input your gross scores (e.g. 82, 85, 79, 91) along with USGA Course Rating and Slope Rating for each round played.
Calculate Score Differentials
The tool calculates the Score Differential for each round using the World Handicap System formula: `(113 / Slope) * (Score - Course Rating - PCC)`.
Select Lowest Score Differentials
Under official WHS rules, the lowest 8 differentials out of your most recent 20 rounds are averaged.
Review World Handicap Index & Course Handicap
Inspect your calculated Handicap Index and calculate your Course Handicap for any specific golf course tees.
Key Features & Capabilities
- Official USGA / R&A World Handicap System (WHS) calculation engine
- Score Differential formula: `Score Differential = (113 / Slope Rating) * (Adjusted Gross Score - Course Rating - PCC)`
- Automated WHS selection table: averages best 8 of 20 rounds, best 3 of 6 rounds, or lowest 1 of 3 rounds for new golfers
- Course Handicap calculator: `Course Handicap = Handicap Index * (Slope Rating / 113) + (Course Rating - Par)`
- Soft Cap and Hard Cap limiters preventing rapid handicap index inflation after temporary slumps
- Playing Handicap allowance converter for Match Play, Stroke Play, and Four-Ball Scrambles
Frequently Asked Questions
What is the official World Handicap System (WHS) Score Differential formula?
Under the World Handicap System (WHS) established by the USGA and R&A, each round's Score Differential is calculated as: `Score Differential = (113 / Slope Rating) * (Adjusted Gross Score - Course Rating - Playing Conditions Calculation [PCC])`, rounded to the nearest tenth.
How many rounds are used to calculate a golf Handicap Index?
Once a golfer has 20 or more rounds recorded, the Handicap Index is calculated by taking the average of the lowest 8 Score Differentials among the most recent 20 rounds. For golfers with fewer than 20 rounds, the WHS uses a sliding scale (e.g. best 1 of 3 rounds, best 3 of 6 rounds, best 6 of 15 rounds).
What is the difference between Course Rating and Slope Rating?
Course Rating represents the expected score for a scratch golfer (0 handicap) under normal conditions (typically near par, e.g. 71.5). Slope Rating measures the relative difficulty of the course for a bogey golfer compared to a scratch golfer, ranging from 55 to 155 with standard average difficulty defined as 113.
How do you calculate your Course Handicap for a specific course?
The formula is: `Course Handicap = Handicap Index * (Slope Rating / 113) + (Course Rating - Par)`. For example, a 10.4 handicap index playing a course with Slope 130, Course Rating 72.4, and Par 72 receives `10.4 * (130 / 113) + (72.4 - 72) = 11.96 + 0.4 = 12.36 -> 12 strokes`.
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