Tamil Nadu's University System & CGPA Grading Explained
Tamil Nadu is one of India's most industrialised states and a powerhouse of engineering education. Anna University, Chennai, operates one of the largest technical university networks in the country, affiliating hundreds of engineering colleges, while NIT Trichy is a premier central institute and SRM (SRMIST) and VIT (Vellore) are among the most sought-after private deemed universities in India.
Under the Choice Based Credit System (CBCS) and the UGC 10-point grading scale, every university publishes its own CGPA to percentage conversion rule in its academic regulations. We currently index 4 verified Tamil Nadu university formulas below — select your university to convert instantly, free of cost, with a printable PDF report.
Official CGPA to Percentage Formula for Tamil Nadu Universities
Tamil Nadu's indexed universities all follow a single officially documented conversion:
Standard Tamil Nadu CGPA to Percentage Formula:
Percentage (%) = CGPA × 10
Note: Unlike the AICTE (CGPA − 0.75) × 10 model used in several other states, Anna University, NIT Trichy, SRM and VIT all convert directly with CGPA × 10. NIT Trichy applied CGPA × 9.25 only for its 2010 pass-out batch.
Tamil Nadu University Formula Quick Table
| University | Official Formula | Example (CGPA 8.0) | Calculator |
|---|---|---|---|
| AU | CGPA × 10 | 8.0 × 10 = 80.0% | Convert → |
| NIT Trichy | CGPA × 10 | 8.0 × 10 = 80.0% | Convert → |
| SRM | CGPA × 10 | 8.0 × 10 = 80.0% | Convert → |
| VIT | CGPA × 10 | 8.0 × 10 = 80.0% | Convert → |
Formulas verified from official academic regulations. Always cross-check the “Official Notice” badge on each university page before submitting forms.
How to Convert CGPA to Percentage: Step-by-Step Guide
- Step 1 — Find your CGPA: Locate the final CGPA on your marksheet or University website, e.g.
8.0. - Step 2 — Pick your university formula: Select your university from the directory above; the official formula is applied automatically by our calculator.
- Step 3 — Apply the formula: For Anna University, NIT Trichy, SRM and VIT,
8.0 × 10 = 80%— no deduction is applied. - Step 4 — SGPA to CGPA: If you only have semester SGPAs, aggregate them by credits first — your CGPA is the credit-weighted average of all semesters.
Use the Semester Aggregator tab on your university page to combine six or eight semesters into a single CGPA before converting.
All 4 Tamil Nadu Universities — CGPA to Percentage Calculators
Every university below has a dedicated calculator with its official conversion formula, reference table and PDF report download:
Tamil Nadu CGPA to Percentage — FAQs
Q1: How do I convert CGPA to percentage in Tamil Nadu universities?
Every Tamil Nadu institution indexed here — Anna University, NIT Trichy, SRM and VIT — converts directly: Percentage = CGPA × 10. A CGPA of 8.0 equals 80.0%, with no 0.75 or 0.5 deduction applied.
Q2: What is the Anna University CGPA to percentage formula?
Anna University applies CGPA × 10 to all UG and PG programmes under Regulations R-2015, R-2018 and R-2019, per the official ACOE(UDs) Letter No. 001/ACOE(UDs)/2021. A CGPA of 10.0 corresponds to 100%.
Q3: Does NIT Trichy use the same formula?
Yes — NIT Trichy converts as CGPA × 10, certified by the Academic Office on 15.11.2019, except for the 2010 pass-out batch for which CGPA × 9.25 applies.
Q4: Is SRM's conversion CGPA × 10 for all batches?
Yes. As per the Office of the Controller of Examinations, the percentage equivalent is CGPA × 10 for UG programmes under the 2018 Regulations (2018 batch) and the 2019 Regulations (2019 batch onwards), across all SRM campuses.
Q5: What about VIT's conversion?
VIT also uses CGPA × 10, per the Office of the Controller of Examinations certificate dated 24-Feb-2025. VIT does not follow the (CGPA - 0.75) × 10 model and computes its CGPA without any normalization.
Q6: How do I convert SGPA to CGPA and then to percentage in Tamil Nadu?
Each semester reports an SGPA (semester grade point average). The cumulative CGPA is the credit-weighted average of all semester SGPAs. Once you have your final CGPA, apply your university formula: for all four indexed institutions, Percentage = CGPA × 10.