Cumulative GPA (Grade Point Average) is the overall GPA. It includes dividing the number of quality points earned by you in all courses attempted by the total degree credit hours in all the attempted courses.
How is Cumulative GPA Different from Semester GPA?
How To Use Cumulative GPA Calculator?
To know how to calculate cumulative GPA, you need to add all subjects chosen by you in every semester and also the weighted average of each semester.
Hope this answers your doubts about what is Cumulative GPA and how to calculate it.