Indira Gandhi National Open University (IGNOU) — 5-point grading programmes
CGPA to percentage
Quick answer: At Indira Gandhi National Open University (IGNOU) — 5-point grading programmes, a CGPA of 3.66 is about 61.99%, using the official formula % = −62.5 + 99.167x − 30x² + 3.333x³, where x = CGPA on IGNOU's 5-point scale (official conversion formula; not for 10-point CBCS). (official source)
Indira Gandhi National Open University (IGNOU) — 5-point grading programmes — CGPA → %
How Indira Gandhi National Open University (IGNOU) — 5-point grading programmes converts CGPA to percentage
Indira Gandhi National Open University (IGNOU) — 5-point grading programmes (Delhi) uses the formula % = −62.5 + 99.167x − 30x² + 3.333x³, where x = CGPA on IGNOU's 5-point scale (official conversion formula; not for 10-point CBCS) to convert a 5-point CGPA into a percentage for transcripts, job applications and higher studies. Enter your CGPA above to convert it instantly.
Worked example
Take a CGPA of 3.66 on the 5-point scale. Applying the official Indira Gandhi National Open University (IGNOU) — 5-point grading programmes formula % = −62.5 + 99.167x − 30x² + 3.333x³, where x = CGPA on IGNOU's 5-point scale (official conversion formula; not for 10-point CBCS) gives a percentage of about 61.99%. Change the CGPA in the calculator above and the percentage updates instantly using this same formula.
Why the formula matters
Using the official conversion keeps your percentage defensible if an admissions office or employer asks how you calculated it.
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
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