The difference between the two formulas lies in the multiplier used and whether a baseline adjustment is applied. Both are methods to convert CGPA to percentage, but they yield slightly different results. Let’s break it down:
1. Formula 1: CGPA × 9.5
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Usage: Commonly used in older SPPU guidelines and in some Indian engineering entrance calculations.
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Mechanism: Multiplies the CGPA directly by 9.5 to estimate the percentage.
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Example:
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Pros: Simple, no subtraction needed.
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Cons: Doesn’t account for baseline adjustment; can slightly overestimate performance for some students.
2. Formula 2: (CGPA – 0.75) × 10
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Usage: Current official formula for SPPU (FE 2019 Rulebook & Circular 322/2020).
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Mechanism: Subtracts 0.75 from CGPA first, then multiplies by 10. This accounts for baseline performance expected by the university.
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Example:
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Pros: More accurate reflection of actual percentage; aligns with official SPPU transcripts.
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Cons: Slightly more complex than simple multiplication.
3. Key Differences
| Aspect | CGPA × 9.5 | (CGPA – 0.75) × 10 |
|---|---|---|
| Multiplier | 9.5 | 10 |
| Baseline adjustment | None | Subtract 0.75 |
| Official for SPPU | Older/legacy | FE 2019 Rulebook & Circular 322/2020 |
| Example (CGPA 8.0) | 76% | 72.5% |
| Accuracy | Can overestimate | Reflects official university standard |
✅ Conclusion: For SPPU 2025 students, always use the (CGPA – 0.75) × 10 formula, as it is the official standard for UG programs and aligns with transcripts issued by the university.