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Home / % to CGPA / Anna University
Tamil Nadu

Anna University
percentage to CGPA

Anna University — % → CGPA

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Forward formula: % = CGPA × 10Source: Anna University, Office of the Additional Controller of Examinations (University Departments), Letter No.001/ACOE(UDs)/2021 dated 15.07.2021 (ref Lr.No.3452/AU/CAC/CGPA2020 dated 29.12.2020), titled 'CGPA to Percentage Conversion', stated verbatim: 'The CGPA to Percentage conversion for all UG and PG programmes of Regulations R-2015, R-2018 and R-2019 are as follows: Percentage of Marks = CGPA X 10'. Corroborated for R-2021 by the Regulations 2021 (CBCS) grade-sheet conversion clause and by the CENTAC Puducherry government conversion table (row 2: 'Anna University — CGPA*10').Status: verifiedLast verified: 2026-06-23 · 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).
This reverses the official CGPA→% formula. A percentage on a transcript is the authoritative figure; the back-calculated CGPA is an estimate. Always confirm with your university.

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.

Need the usual direction? Use the Anna University CGPA to percentage calculator, or browse the full percentage to CGPA directory.

Frequently asked questions

What CGPA is 80% at Anna University?
Reversing the official formula % = CGPA × 10, 80% works out to roughly a 8 CGPA on the 10-point scale. Enter your own percentage in the calculator above for an instant figure.
Is the reverse Anna University CGPA exact?
It's a close estimate. The university calculates your percentage from your CGPA, so reversing the formula recovers it accurately — but transcript rounding can introduce a small difference. Treat the official CGPA on your grade card as authoritative.
Why would an application ask for CGPA when my Anna University marksheet shows a percentage?
Many universities abroad and some Indian employers standardise on CGPA. If your marksheet only prints a percentage, this page gives you a defensible CGPA estimate on the 10-point scale to enter, and you can attach your marksheet as the source of record.

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