Written by ZufishanMS Environmental ScienceLast reviewed
What the Anna University documents say
Anna University, Chennai, uses a 10-point grade system. Its Affiliated Institutions Regulations 2021 add clause 15.5.2: “In the consolidated grade sheet the CGPA earned shall be converted into percentage of marks” as CGPA × 10. Its ACOE (University Departments) letter of 15.07.2021 sets the same conversion for UG and PG programmes under R-2015, R-2018 and R-2019:
Formula: Percentage = CGPA × 10
Neither document covers autonomous colleges or affiliated-college regulations before R2021. If you are unsure which rule covers you, your mark sheet or college circular is the authority, not this page.
Worked examples under both formulas
| CGPA | CGPA × 10 (affiliated R2021; Departments R-2015 to R-2019) | (CGPA − 0.5) × 10 (before R2021, not verified) |
|---|---|---|
| 10.0 | 100.0% | 95.0% |
| 9.5 | 95.0% | 90.0% |
| 9.0 | 90.0% | 85.0% |
| 8.5 | 85.0% | 80.0% |
| 8.0 | 80.0% | 75.0% |
| 7.5 | 75.0% | 70.0% |
| 7.0 | 70.0% | 65.0% |
| 6.5 | 65.0% | 60.0% |
| 6.0 | 60.0% | 55.0% |
| 5.0 | 50.0% | 45.0% |
The two formulas always differ by 5 percentage points. That can matter at a 60% or 65% eligibility cut-off, so use the one your own document states.
Comparison with the general Indian formula
| CGPA | Anna (CGPA × 10) | General ((CGPA − 0.75) × 10) |
|---|---|---|
| 9.0 | 90.0% | 82.5% |
| 8.0 | 80.0% | 72.5% |
| 7.5 | 75.0% | 67.5% |
| 7.0 | 70.0% | 62.5% |
| 6.5 | 65.0% | 57.5% |
How to use this calculator
- Choose the formula. The CGPA × 10 option is selected by default; pick “affiliated, before R2021” only if your mark sheet or college circular uses (CGPA − 0.5) × 10.
- Enter your overall CGPA from your grade statement.
- Read the percentage in the result panel.
- Use the SGPA to CGPA Calculator first if you only have per-semester SGPAs.
When to use the Anna University CGPA Calculator
Use it when a placement, job or admission form asks for a percentage. Where a form asks how the percentage was derived, quote the rule on your own document, and submit the university-issued grade statement if an official document is required. For overseas graduate applications, use the CGPA to GPA converter to show the US 4.0 equivalent. If you only have semester SGPAs and need the cumulative CGPA first, use the SGPA to CGPA Calculator.
Common mistakes
Assuming one formula covers every student. The CGPA × 10 rule is documented for affiliated colleges under R2021 and for University Departments under R-2015 to R-2019. Autonomous colleges and older affiliated regulations may state their own rule on the mark sheet.
Using semester SGPA instead of cumulative CGPA. The formula converts your cumulative CGPA, not a single semester SGPA.
Using the general Indian formula. Applying (CGPA minus 0.75) times 10 to an Anna University result gives a lower figure than either Anna option.
Related calculators
- Anna University GPA Calculator to work out your GPA or CGPA from R2021 letter grades
- SGPA to CGPA Calculator to get your cumulative CGPA from semester SGPAs
- CGPA to Percentage India for all Indian university formulas in one tool
- CGPA to GPA for converting Anna University CGPA to the US 4.0 scale
- VTU SGPA Calculator for Karnataka engineering results
- Percentage to CGPA for the reverse conversion
The default result follows Anna University's Affiliated Institutions Regulations 2021 (clause 15.5.2, read 20 September 2026) and its ACOE letter No. 001/ACOE(UDs)/2021 of 15.07.2021 (read 19 September 2026). The second option is not verified. Confirm with your college exam cell before using a result on an official document.
Sources
The formula on this page follows the documents below. Confirm any figure that matters with the issuing body or your registrar.
- Anna University: Affiliated Institutions Regulations 2021 (B.E./B.Tech.), clause 15.5.2: Non-autonomous affiliated colleges and University Colleges of Engineering, from 2021-22: Percentage of Marks = CGPA × 10 (inserted clause); read 20 September 2026 (the site may not load outside India)
- Anna University, ACOE (University Departments): Letter No. 001/ACOE(UDs)/2021, 15.07.2021: Percentage of Marks = CGPA × 10 for R-2015, R-2018 and R-2019; read 19 September 2026 (the site may not load outside India)