Multiply your GPA by the number of classes taken. If the GPA equals 3.0 and a student takes seven credit hours, multiply the two together to receive 24. This number equals your total number of grade points.
Determine the maximum number of grade points possible. Multiply the grade point corresponding to each grade letter by the number of classes taken to find the maximum score. A grade of "A" equals four points, "B" equals three, "C" equals two, "D" equals one, and anything less equals zero. A student taking seven classes and receiving all "A" grades would receive a maximum of 28 grade points. All "B" grades would equal 21 grade points.
Find the grades in each class by evaluating your total grade points. Receiving a 3.0, or 21 grade points, means a student either scored all "B" grades. The student may also have received an equal number of "A" and "C" grades which, when averaged, equals a B. The "A" grade score of four and "C" grade score of two, when averaged, equals a "B" grade score of three.
Multiply your GPA by the number of credit hours taken. A student taking 20 credit hours who received a 3.0 average GPA earned 60 GPA points during the semester.
Determine the maximum number of grade points possible. Multiply the number of points per letter grade by the number of credit hours each class represents. An "A" grade equals four points, a "B" equals three, a "C" equals two, a "D" equals one, and anything less equals zero. A maximum "A" grade in a four credit hour class equals 16 GPA points. Add all the top grade points possible to find the maximum number.
Find the exact grade point for each class for a more accurate description of your GPA. A "B" grade in a class worth three credit hours equals nine points. Subtract that from your total number of points and continue to do so until your score equals zero or until you find the score desired.