Find your grade and the number of credit hours for each class that you took for the degree.
Convert your letter grade to a number grade. Your school's course catalog will provide you information on what the conversion is. Usually, the conversion is 4 for an A, 3 for a B, 2 for a C, 1 for a D and 0 for an F. If you have a "+" you add 0.33. If you have a "-" you subtract 0.33. Your school's catalog will give exact numbers.
Multiply the credit hours by the classes' numeric grade to find your quality points for the class.
Add together the quality points for every class you took to calculate total quality points.
Add together all of the credit hours for classes you took to calculate total credit hours.
Divide your total quality points by your total credit hours to calculate your post-baccalaureate grade point average.