You can calculate your GPA for Anna University by adding the grade credit points of various subjects and divide it by total credits for the semester. This will give you the GPA. The grade point for S is 10, A is 9, B is 8, and so on.

GPA= [(Subject 1* Credit 1) + (Subject 2* Credit 2) +...+(Subject n* Credit n)] / (Credit 1+...+ Credit n)

Let’s say you have 5 subjects with 3 credits each and you got 8, 7, 9, 9, and 7 in these subjects.

[(8*3 + 7*3 + 9*3 + 9*3 + 7*3)] / 15.

123/15 = 8.5 GPA

If you want to calculate your CGPA, repeat the above process for all your semesters and you will have your CGPA.