Anna University introduced Regulation 2025 (R2025) for students admitted from 2025. It keeps the Choice-Based Credit System (CBCS) but refreshes the grading scale, raises the emphasis on continuous assessment, and slightly changes the grade letters. Here is everything that matters — grades, GPA/CGPA, percentage and classification — in plain language.
R2025 grade points
R2025 uses a 10-point absolute grading system. The top grade is now S (it was O under R2021) and the fail grade is U:
| Grade | Marks range | Grade point | Meaning |
|---|
| S | 91–100 | 10 | Outstanding |
| A+ | 81–90 | 9 | Excellent |
| A | 71–80 | 8 | Very Good |
| B+ | 61–70 | 7 | Good |
| B | 56–60 | 6 | Above average |
| C | 50–55 | 5 | Pass |
| U | Below 50 | 0 | Fail (reappear) |
⚠️ Colleges publish the exact mark bands in their own R2025 regulation copy, and a few list an additional intermediate grade. Treat the table above as the standard structure and always confirm your grade against your marksheet or the official Regulation 2025 document before relying on it for eligibility or applications.
SGPA & CGPA formula
Both use the same credit-weighted average — higher-credit subjects pull your average more:
SGPA / CGPA = Σ (Credit × Grade Point) ÷ Σ (Credit)
SGPA is for one semester; CGPA is the cumulative figure across all completed semesters. Compute yours instantly (in R2025 mode) with our Anna University GPA calculator.
Quick example
Three subjects: Maths (4 credits, A = 8), Physics (3 credits, A+ = 9), Programming (4 credits, B+ = 7). Total = (4×8)+(3×9)+(4×7) = 32+27+28 = 87 over 11 credits → SGPA = 87 ÷ 11 = 7.91.
CGPA to percentage
Percentage = CGPA × 10
A CGPA of 8.0 is 80%. This is the standard Anna University conversion and is what most companies and universities accept — mention it on your resume alongside your CGPA.
Degree classification
| CGPA | Classification |
|---|
| 8.50 and above* | First Class with Distinction |
| 6.50 – 8.49 | First Class |
| 5.00 – 6.49 | Second Class |
*Distinction requires no history of arrears and completing the programme in the normal duration. Even one cleared arrear can move you from Distinction to First Class — so clearing papers in the first attempt matters for classification.
What changed from R2021 to R2025
- Grade letters: top grade O → S; fail grade shown as U.
- Pass mark: effectively 50 — below 50 is a U (reappear).
- More continuous assessment: greater weight on internals, projects and practical/lab work, not just the end-semester exam.
- Same core maths: CBCS credit structure, the CGPA formula and the
CGPA × 10 percentage conversion are unchanged.
- Who it applies to: only the 2025-admitted batch onward. R2021 and R2017 students stay on their own regulation.
Frequently Asked Questions
What is Anna University Regulation 2025 (R2025)?
R2025 is the academic regulation for students admitted to Anna University affiliated engineering programmes from the 2025 batch onward. It defines the curriculum, credit system (CBCS), continuous assessment, grading, GPA/CGPA calculation and degree classification. Students under R2021 or R2017 continue on their own regulation.
What are the grade points in R2025?
R2025 uses a 10-point absolute scale: S = 10 (91–100), A+ = 9 (81–90), A = 8 (71–80), B+ = 7 (61–70), B = 6 (56–60), C = 5 (50–55), and U = 0 (below 50, fail). Always confirm the exact band on your official regulation copy.
How is CGPA calculated in R2025?
CGPA = Σ(Credits × Grade Points) ÷ Σ(Credits) across all completed semesters. SGPA uses the same formula for a single semester. Higher-credit subjects count more.
How do I convert R2025 CGPA to percentage?
Multiply your CGPA by 10. A CGPA of 8.0 equals 80%. This is the standard Anna University conversion.
What CGPA is Distinction and First Class in R2025?
First Class with Distinction needs a CGPA of 8.5 or above with no history of arrears. First Class needs 6.5 or above. Below that is Second Class.
How is R2025 different from R2021?
R2025 renames the top grade from O to S and the fail grade to U, raises the effective pass mark to 50, and puts more weight on continuous assessment, projects and practical learning while keeping the same CBCS credit structure and CGPA×10 percentage conversion.
🔗 Official source: your college's Regulation 2025 document and the Anna University Centre for Academic Courses (cac.annauniv.edu). This guide explains the system; the official regulation is the final word on exact bands and rules.