Get your grades. For GPA calculation purposes, each letter grade is assigned a number. The numbers are as follows:
A = 4 points
B = 3 points
C = 2 points
D = 1 point
F = 0 points
Write down the number of points you have for each grade, and add them. For example, if you took eight classes, and you have A's in four classes (16 points), B's in three classes (9 points) and a C in one class (2 points), you have a total of 27 points.
Divide the total number of points by the number of classes you took. In this example, you would divide 27 by eight. Your GPA would be 3.38.