Enter at least 5 scores, along with the course rating and slope rating for the course you played. The course and slope rating can usually be found on your scorecard. Be sure to use the slope rating for the set of tees you played.
All scores should be adjusted gross scores, as defined by the USGA. Basically, the adjusted gross score caps the number strokes you can count on a hole, to eliminate 'blow up holes'. Read the calculating handicap post for more information.
Click the calculate handicap button
If you are logged in, you can save your scores to edit and use in the future by clicking 'Save Scores'.
Handicaps shown here are unofficial, of course.
This script is free software
The Golf Handicap Calculator Script is available for your use and redistribution under the GPL version 2.
View the source on this page for details.