How to Calculate CGPA from Marks: Formulas and Examples
Learn how to convert raw marks or percentages to CGPA, and how different Indian universities calculate CGPA from internal and external exam scores.
By SGPA2CGPA Team
Converting Marks to CGPA
Many students want to know: “If I scored 75% in my exams, what is my CGPA?” The answer depends on which formula your university uses, but there are standard approaches.
The Standard Percentage-to-CGPA Formula
Most Indian universities that follow the UGC (University Grants Commission) or AICTE guidelines use:
CGPA = Percentage ÷ 9.5
| Percentage | CGPA (÷9.5) |
|---|---|
| 95% | 10.0 |
| 90% | 9.47 |
| 85% | 8.95 |
| 80% | 8.42 |
| 75% | 7.89 |
| 70% | 7.37 |
| 65% | 6.84 |
| 60% | 6.32 |
| 55% | 5.79 |
| 50% | 5.26 |
How SGPA Is Calculated from Subject Marks
Before computing CGPA, your university first calculates SGPA for each semester using subject-level grade points:
- Map marks to grade points based on the university’s grading table
- Multiply each subject’s grade points by its credit hours
- Divide by total credits of that semester
Example Grade Point Table (Common for Indian Universities)
| Marks Range | Grade | Grade Point |
|---|---|---|
| 90–100 | O | 10 |
| 80–89 | A+ | 9 |
| 70–79 | A | 8 |
| 60–69 | B+ | 7 |
| 55–59 | B | 6 |
| 50–54 | C | 5 |
| 40–49 | D | 4 |
| < 40 | F | 0 |
Worked Example
A student in Semester 1 has these results:
| Subject | Marks | Grade Points | Credits | Weighted |
|---|---|---|---|---|
| Mathematics | 82 | 9 | 4 | 36 |
| Physics | 74 | 8 | 3 | 24 |
| Chemistry | 65 | 7 | 3 | 21 |
| Programming | 88 | 9 | 4 | 36 |
| Engineering Drawing | 55 | 6 | 2 | 12 |
Total Credits = 16
Total Weighted = 129
SGPA = 129 ÷ 16 = 8.06
University-Specific Differences
Different universities have slightly different grading tables:
- Anna University — uses O, A+, A, B+, B, C grading
- Mumbai University — uses letter grades mapped to 7-point scale in some programs
- VTU (Visvesvaraya) — uses a 10-point grade scale with S, A, B, C, D, E grades
- DU (Delhi University) — uses both percentage and CGPA depending on the program
Always check your official university grade chart to ensure accuracy.
Conclusion
Understanding how marks translate to CGPA is crucial for students who want to track their academic standing. Our free SGPA to CGPA calculator automates the weighted average calculation — just enter your SGPA and credit hours for each semester to get your CGPA instantly.