Get your scores, or grades, from each class in which you are enrolled. Your teachers will provide you with either a letter grade or a numerical grade. If you are given a numerical grade, you need to determine which letter grade it stands for. Letter grades are based on the following scores:
90 -- 100 A
80 -- 89 B
70 -- 79 C
60 -- 69 D
0 -- 59 F
Give each of your letter grades a numerical value based on the GPA scoring system. Each letter grade is worth the following numerical value:
A = 4 points
B = 3 points
C = 2 points
D = 1 point
F = 0 points
Add together the numerical grades for each class. If you have five classes and you have two "A"s, one "B" and two "C"s, your numerical score is 15.
Divide the number of classes you took by the numerical value given to each of your grades. In this instance you took five classes and obtained a numerical value of 15 points total; divide 15 by five to obtain your GPA of 3.0.