Firstly, get your grades earned for all courses and refer to the grade point values assigned for each grade. Usually they are assigned as A-5, B-4, C-3, D-1, F-0 or A-4, B-3, C-2, D-1, F-0. Note down the grade points scored by you. Next, add up all the grade point values and divide the total, by number of courses and voila! You have the GPA.