Marks and GradesThe method
This calculator follows the procedure recommended in the University Grants Commission's guidelines on the choice based credit system. For a semester, each course's credits are multiplied by its grade point, the products are added, and the sum is divided by the total credits. For the CGPA, each semester's SGPA is multiplied by that semester's credits, and the sum is divided by the total credits of all semesters. Both are shown to two decimal places, as the guidelines say.
Choosing the grade letters
Three sets are built in, each taken from the body's own document: the UGC's recommended letters, VTU's S to F, and Anna University's O to C with U. If your university uses other letters, choose "Type grade points as numbers" and enter the grade point of each course from the key on your grade card.
Things that change the answer
- Credits. A 4-credit course counts four times as much as a 1-credit course. Copy the credits from your grade card, not from memory.
- Failed courses. A fail carries grade point 0. How a later pass replaces it in the CGPA is set by each university.
- Non-credit courses. Audit, mandatory non-credit and satisfactory or unsatisfactory courses are not entered at all.
From CGPA to percentage
Once you have the CGPA, use your university's own conversion. The converter has the official rules we have read and lets you type any other. The guide SGPA and CGPA works through the UGC's own example.
Questions people ask
What is the formula for SGPA?
SGPA = sum of (credits × grade point) for all courses of the semester ÷ sum of the credits. This is the formula in the UGC guidelines.
Is CGPA the average of all SGPAs?
It is the average weighted by credits. Multiply each SGPA by its semester's credits, add, and divide by the total credits. A plain average is right only if every semester has the same credits.
What grade point is an F?
Zero, in the UGC scale and in the VTU scale. In Anna University's regulations the grade U, reappearance, carries zero.
My university uses different letters. Can I still use this?
Yes. Choose "Type grade points as numbers" and enter the grade point for each course from your grade card.
Check with your board or university. The rules quoted on this site were read in the official documents on 12 November 2026. Boards and universities revise them, and yours may differ. For anything that decides an admission or a job, use the rule printed on your own mark sheet or in your institution's regulations. This is an independent site.