GPA is an evaluation of your performance at any given point during the course, whereas CGPA checks your overall performance throughout the course. Here is a detailed description of the calculation for better understanding.
CGPA Calculation
CGPA represents your overall average across multiple semesters and is primarily a weighted average of all GPAs, considering the credits per semester.
The general formula used for calculating your CGPA is: CGPA = (SGPA × Semester Credits) added for all semesters, then divided by Total Credits Across All Semesters
Example - Let us say you have completed two semesters with the following results:
|
Semester
|
SGPA
|
Credits
|
SGPA × Credits
|
|
Semester 1
|
8.2
|
20
|
164
|
|
Semester 2
|
7.8
|
22
|
171.6
|
|
Total
|
-
|
42
|
335.6
|
CGPA = 335.6 ÷ 42 = 8.0
This means that even though your Semester 1 SGPA was slightly higher than your Semester 2 SGPA, Semester 2 carries more weight because it has more credits (22 vs 20). This is why semesters with higher credit loads have a bigger impact on your final CGPA.
GPA Calculation
GPA (Grade Point Average) is calculated by averaging the weighted grade points earned for each course based on the credit hours of those courses.
The general formula used for determining the GPA is: GPA = (Grade Points × Credit Hours) added for all courses, then divided by Total Credit Hours
Example - Let us say you are in your second semester and have enrolled in three subjects:
|
Subject
|
Grade
|
Grade Points
|
Credit Hours
|
Grade Points × Credit Hours
|
|
Mathematics
|
A
|
4.0
|
3
|
12.0
|
|
Economics
|
B+
|
3.3
|
4
|
13.2
|
|
English
|
A-
|
3.7
|
3
|
11.1
|
|
Total
|
-
|
-
|
10
|
36.3
|
GPA = 36.3 ÷ 10 = 3.63
This means your GPA for this semester is 3.63 on a 4.0 scale, which shows strong academic performance. Economics contributes the most to your GPA despite a lower grade (B+) because it carries the highest credit weight (4 credits). This shows how higher-credit courses have a greater impact on your final GPA.