Convert each subject’s marks to grade points using your institution’s grading scale
Multiply each subject’s grade point by its credit hours or weight
Add all the weighted grade points
Add all the credit hours or weights
Divide total weighted grade points by total credit hours or weights
Use the formula: CGPA = Sum of (Grade Point × Credit) / Sum of Credits
If all subjects have equal weight, average the grade points directly
If marks are given as percentages, first convert them to grade points using the official conversion table
Round the final CGPA if your institution requires rounding