Table Of Contents 
Introduction 
Description 
An Example 
Officlal USGA Handicap System Manual 
Indroduction 
For the purposes of the Happy Hackers Golf Society, the USGA estimated
handicap that is generated for each member is a very simplified a rough estimate of what each member could expect to be playing at.
For a detailed description of what the USGA Handicap system is please refer to the Official USAG Handicap System Manual. 
DESCRIPTION  
The calculation of a USGA Handicap in it's simplified form is as follows:
Firstly you look at the all the previous rounds entered for a specified golfer, if more than 20 rounds entered then the most recent 20 rounds are examined. The Handicap Differential for each of these rounds is calculated, and from the following table the specified number of best rounds are extracted :
To Calculate the a rounds Handicap Differential the following formula is used :
The above formula translates to the following in our terms :
The USGA Slope Rating is only available on courses in the US. So for the purposes of the Happy Hackers, every course has a rating of 113. Not entirely accurate, but there's really nothing else that can be done. Once a specific number of lowest rounds has been calculated an average Handicap Differential is determined and multiplied by 0.96 to get your USGA Handicap :

An Example  
Take Golfer A, who has played the following rounds of Golf :
As 17 Rounds have been entered, we take the best 7 Handicap Differentials :
From the above listed lowest rounds :
I hope this example explains how the Happy Hackers Society members estimated USGA
handicap is calculated. 