Written by ZufishanMS Environmental ScienceLast reviewed
Why REC needs its own calculator
Rajalakshmi Engineering College is affiliated to Anna University but holds autonomous status, extended by the University Grants Commission in January 2024 for 2023-24 to 2032-33 (UGC letter No. F.2-10/2023(AC-Policy) to Anna University). An autonomous college sets its own curriculum, examinations and grading. That is why applying Anna University’s conversion to an REC result gives the wrong answer, and why a generic Indian grade calculator does not fit either.
The grade points, from clause 15.1
| Grade | Points | Marks (fixed grading) |
|---|---|---|
| O (Outstanding) | 10 | 91 – 100 |
| A+ (Excellent) | 9 | 81 – 90 |
| A (Very Good) | 8 | 71 – 80 |
| B+ (Good) | 7 | 61 – 70 |
| B (Average) | 6 | 56 – 60 |
| C (Satisfactory) | 5 | 50 – 55 |
| U (Re-appearance) | 0 | below 50 |
Those mark bands apply only when a course has 30 students or fewer. Above that, REC uses relative grading: the cut-offs are computed per course from the marks of students who passed, so your grade depends on the cohort rather than a fixed threshold.
Internal and end-semester weighting, from clause 12
| Course type | Continuous assessment | End-semester |
|---|---|---|
| Theory | 40% | 60% |
| Laboratory | 60% | 40% |
| Theory with laboratory | 50% | 50% |
| Project | 40% | 60% |
Passing needs two things, not one
Clause 14.1 requires 50% of the total marks and, separately, at least 45% in the end-semester examination. A strong internal score cannot rescue a failed end-semester paper. If you reappear, the continuous assessment marks from your first attempt carry forward to the second attempt, but from the third attempt onwards they are dropped and the end-semester paper alone must reach 50%.
Attendance
REC requires a minimum of 75% attendance in every course, rounded to the nearest integer. Falling short produces an SA grade, which bars you from that course’s end-semester examination. The attendance calculator works out how many classes that leaves you.
About the CGPA to percentage question
REC publishes no CGPA to percentage conversion. The R2023 UG Regulations contain none, and the only percentage formula in the document is the attendance one. Several third-party tools show a conversion for REC anyway; those are estimates, not an REC rule.
If an employer or university asks for a percentage, ask REC’s Controller of Examinations what the college will certify, and submit the grade sheet REC issues. A calculated percentage is not something REC stands behind.
Source and currency
Every figure on this page is taken from REC’s Regulations 2023, B.E./B.Tech. (UG), published on the college’s academics page, read on 11 September 2026. Regulations change between admission batches, so confirm that R2023 is the regulation you were admitted under before relying on these numbers.
Sources
The formula on this page follows the documents below. Confirm any figure that matters with the issuing body or your registrar.
- Rajalakshmi Engineering College: R2023 regulations: Grade bands, grade points and assessment weighting