GPA calculation methods vary by country and by institution, as some give extra points for honors classes and some weight score by units. For example, in the United States a four-point scale is used where A = 4, B = 3, C = 2, D = 1, and F = 0. So, to compute your GPA you need to do the following steps:
1. List your grades in all the courses you are enrolled in
2. Find their corresponding scale value (A = 4, B = 3, C = 2, D = 1, and F = 0)
3. Multiply the scale value by the number of credits to get the grade points
4. Sum up all the of your grade points .
5. Divide your grade point total by the total credit hours of the classes you attended.