A repeated course can affect CGPA in different ways depending on how the university counts the old attempt. Replacing its quality points and counting both attempts are separate calculations.
Repeated Course CGPA shows both scenarios and highlights the one you select. Neither option becomes your university’s policy merely because it appears in the calculator.
Begin with a transcript that includes the old attempt
Enter current CGPA and current counted credits before the repeat is added. That current total must already include the old course attempt.
The old and new course use the same credit count in the replacement scenario. If the course credit value changed, this simple replacement model may not match the official calculation.
Copy old and new grade points from the applicable grading record. Set the maximum grade point to your transcript scale and select how attempts are counted.
Replacing three credits at 1.0 with 4.0
Consider a current CGPA of 3.0 over 60 credits. That represents 180 quality points. A three credit course at 1.0 contributed three of those points.
Replacing that old contribution with three credits at 4.0 removes three points and adds 12. The new total is 189 quality points over the same 60 credits, giving a CGPA of 3.15.
If both attempts count instead, the new attempt adds 12 points and three credits. The result is 192 ÷ 63 = 3.0476. The improvement is smaller because the earlier low attempt remains in the calculation.
A useful consistency check
The old course credits cannot exceed the current counted total. The old course contribution must also fit inside the quality points represented by the current CGPA.
If the inputs are inconsistent, the tool rejects them. That can happen when current CGPA already reflects the replacement, yet you are trying to replace the old attempt again.
What to confirm with the examination office
Ask which attempt counts, whether the new grade is capped, whether both attempts remain visible, and whether the counted credits change. A visible transcript entry and a GPA counted entry are not necessarily the same thing.
Save the selected policy alongside your worksheet. A result without its policy label is easy to misread later.
Once the official semester result is issued, use that record in Cumulative GPA. The repeat calculator is for comparing declared scenarios, not changing or certifying an academic record.