Anna University
percentage to CGPA
Quick answer: At Anna University, 80% is about a CGPA of 8 on the 10-point scale, reversing the official formula % = CGPA × 10. (official source) Last verified 2026-07-19.
Anna University — % → CGPA
Converting Anna University percentage back to CGPA
Anna University (Tamil Nadu) officially converts CGPA to percentage with % = CGPA × 10. This page inverts that formula so you can estimate the CGPA behind a known percentage — useful when a scholarship form, job portal or foreign application asks for CGPA but your marksheet only shows a percentage. Enter your percentage above and the calculator solves for the CGPA on the 10-point scale.
Worked example
The official Anna University formula is % = CGPA × 10. To go the other way, you rearrange it to solve for CGPA. Starting from a percentage of 80%, the formula reverses to a CGPA of about 8 on the 10-point scale. You can check this by running 8 through the forward Anna University CGPA to percentage calculator — it returns 80%, confirming the two directions agree.
Why this is an estimate, not an official figure
A university issues your percentage from your actual CGPA, not the other way around — so reversing the formula recovers the CGPA that would produce that percentage. It matches in almost every case, but rounding on your transcript (for example a percentage printed to one decimal place) can shift the back-calculated CGPA slightly. When both numbers appear on your grade card, always quote the official CGPA rather than this estimate.
About Anna University
Anna University, established in 1978 and headquartered at Guindy, Chennai, Tamil Nadu, is one of India's largest technological universities. It directly administers its University Colleges of Engineering and affiliates a very large number of engineering colleges across Tamil Nadu, prescribing common Choice Based Credit System regulations (R-2017, R-2021) for its non-autonomous affiliated institutions on a ten-point grading scale.
Address: Anna University, Sardar Patel Road, Guindy, Chennai – 600025, Tamil Nadu, India.
Source & verification
Formula explicitly STATED in Anna University's own ACOE document (top-tier source: official conversion letter, read in full): 'Percentage of Marks = CGPA X 10' (CGPA 8.0 → 80%). The letter's stated scope is Regulations R-2015, R-2018 and R-2019 (all UG and PG programmes); R-2021 batches use the same flat ×10, per the R-2021 grade-sheet conversion clause and the CENTAC government table. Consistent with the award-of-class bands: First Class with Distinction at CGPA ≥ 8.50, First Class ≥ 6.50, Second Class below. Although Anna University's R-2021 uses relative (Box-Cox) grading for larger theory cohorts at the course level, the CGPA-to-percentage step itself is a flat ×10. The widely circulated (CGPA − 0.5) × 10 and (CGPA − 0.75) × 10 figures for 'Anna University' are content-farm contamination — (CGPA − 0.5) × 10 is actually the Pondicherry/CENTAC-default value — and must not be used. DISAMBIGUATION: Anna University = state technical university, Chennai — distinct from IIT Madras ((CGPA − 0.75) × 10 region), University of Madras (band classification, no stated conversion), and Annamalai University (separate DB key). Autonomous colleges affiliated to Anna University set their own conversion (see KCT, Kongu, KPRIET, Mepco, Bannari Amman entries, all plain ×10 under own regulations).
Need the usual direction? Use the Anna University CGPA to percentage calculator, or browse the full percentage to CGPA directory.