Golf Handicap Calculator
The formula for these calculations is identical to the USGA formula; however, these three different handicap values cover the majority of handicapping calculations worldwide. USGA Rules Handicap Section 10-1 deals with handicap differentials and how to calculate them. The differential is your score less the course rating. The USGA does not endorse this calculator or any other, other than their own.
By definition, a USGA Handicap Index is a USGA mark that represents the potential ability of a player on a course of standard difficulty, as determined by the USGA. Potential ability is measured by a player's best scores, and is expressed as a number taken to one decimal place. These scores are identified by calculating the handicap differential for each score. The USGA Handicap Index is calculated by taking 96% of the average of the best handicap differentials, and applying USGA Rules Handicap Section 10-3 for golfers with two or more eligible tournament scores. A handicap differential is computed from four elements. Those are adjusted gross score, USGA Course Rating, USGA Course Slope Rating and 113 (the slope rating of a course of standard difficulty). To determine the handicap differential (Index), subtract the USGA Course Rating from the adjusted gross score; multiply the difference by 113; then divide the resulting number by the USGA Course Slope Rating. Round the final number to the nearest tenth. A factored handicap is reduced to the last whole number. As a formula,
Handicap Differential = ((Adjusted Gross Score - USGA Course Rating) x 113 / USGA Slope Rating)