Indira Gandhi National Open University (IGNOU) — 5-point grading programmes
percentage to CGPA

Converting Indira Gandhi National Open University (IGNOU) — 5-point grading programmes percentage back to CGPA

Indira Gandhi National Open University (IGNOU) — 5-point grading programmes (Delhi) officially converts CGPA to percentage with % = −62.5 + 99.167x − 30x² + 3.333x³, where x = CGPA on IGNOU's 5-point scale (official conversion formula; not for 10-point CBCS). This page inverts that formula so you can estimate the CGPA behind a known percentage. Enter your percentage above and the calculator solves for the CGPA on the 5-point scale.

Worked example

The official Indira Gandhi National Open University (IGNOU) — 5-point grading programmes formula is % = −62.5 + 99.167x − 30x² + 3.333x³, where x = CGPA on IGNOU's 5-point scale (official conversion formula; not for 10-point CBCS). Starting from a percentage of 61.99%, the formula reverses to a CGPA of about 3.66 on the 5-point scale. You can check this by running 3.66 through the forward Indira Gandhi National Open University (IGNOU) — 5-point grading programmes CGPA to percentage calculator — it returns 61.99%, confirming the two directions agree.

Why this is an estimate, not an official figure

A college issues your percentage from your actual CGPA, not the other way around — so reversing the formula recovers the CGPA that would produce that percentage. When both numbers appear on your grade card, always quote the official CGPA rather than this estimate.

Source & verification

IGNOU, Student Registration & Evaluation Division — circular to all Regional Directors, 'Sub: Grade Point Average (GPA) to Percentage Conversion (PC) … across the Programmes of the University', Ref. Resolution No. ACSC 19.6.3 of the Academic Council's Standing Committee (19th meeting, 19-06-2006); Appendix 'Conversion Formula of Grade into Percentage': 'y = −62.5 + 99.167 x − 30 x² + 3.333 x³, where x = Cumulative Grade Point Average (CGPA), y = Equivalent percentage …'; worked example 'CGPA = 3.66 Corresponding % = 61.99%'.

SCOPE — 5-POINT GRADING ONLY: the formula applies to programmes graded on IGNOU's five-point scale (A 5 Excellent, B 4 Very Good, C 3 Good, D 2 Average, E 1 Unsatisfactory; Common Prospectus s.1.17), e.g. B.Ed and other non-CBCS programmes. It is a cubic fitted to the University's grade-to-percentage bands (4.50+ = 80%+, 3.50–4.49 = 60–79.9%, 2.50–3.49 = 50–59.9%, 1.50–2.49 = 40–49.9%), so 2.5 → 50%, 3.5 → 60%, 4.5 → 80% and 5.0 → ~100%. The circular also gives a lookup table (Appendix) and, for B.Ed (maximum 1100 marks), marks obtained = percentage × 11. It was approved by the Academic Council Standing Committee (Res. ACSC 19.6.3, 19-06-2006). It was issued by the Registrar, Student Registration & Evaluation Division, to Regional Directors, who issue a percentage-equivalence certificate on a learner's written request. The scanned circular was read by OCR; both worked examples reproduce exactly (3.66 → 61.99%, 3.78 → 63.72%). Its circular date is not legible, but the distribution list includes the NEP Nodal Officer, so it is recent. It is hosted on IGNOU's Regional Centre Dehradun site (rcdehradun.ignou.ac.in, an official IGNOU subdomain). NOT FOR CBCS 10-POINT PROGRAMMES (BAG/BCOMG/BSCG etc.): these use the UGC table — O 10 ≥85%; A+ 9 75–<85; A 8 65–<75; B+ 7 55–<65; B 6 50–<55; C 5 40–<50; D 4 35–<40; F <35 (Programme Guide BSCM 2025, sec. 7). No CGPA→% formula was found for them, so do not apply the cubic to a 10-point CGPA. CONTACT: Registrar, Student Evaluation Division (sed@ignou.ac.in; 011-29535828 / 011-29532482); Student Service Centre ssc@ignou.ac.in, 011-29572513.

College contact

Address: Indira Gandhi National Open University, Maidan Garhi, New Delhi – 110068, India
Email: sed@ignou.ac.in
Phone: +91-11-2953-5828
Website: official contact page

Need the usual direction? Use the Indira Gandhi National Open University (IGNOU) — 5-point grading programmes CGPA to percentage calculator, or browse the full percentage to CGPA directory.