Marks and GradesWhich rule should I choose?
- CBSE class 9 and 10. For CBSE certificates that show grades and a CGPA. CBSE's Circular No. 24 of 28 May 2010 gives the overall indicative percentage as 9.5 × CGPA.
- VTU. For B.E. and B.Tech. students of Visvesvaraya Technological University under the regulations effective from 2021-22, clause 21OB12.2: (CGPA − 0.75) × 10.
- Anna University. For B.E. and B.Tech. students of affiliated institutions under Regulations 2021, clause 15.5.3: CGPA × 10.
- My own university's formula. For everyone else. Find the formula on your grade card or in your university's regulations and type its two numbers. A formula such as (CGPA − 0.5) × 10 is entered as multiply by 10, then add −5. A formula such as 7.1 × CGPA + 11 is entered as multiply by 7.1, then add 11.
Why we do not list more universities
We include a formula only when we have read it in the university's own regulations. Formulas copied from other websites are often out of date or belong to a different scheme. If you know the rule printed on your own documents, the "own formula" choice does the same job with certainty.
The answer is only as good as the rule
The same CGPA of 8.2 is 77.9% by the CBSE rule, 74.5% by the VTU rule and 82% by the Anna University rule. Using another institution's rule is the commonest mistake on application forms. If your institution has no formula, quote the CGPA with its scale. More in why there is no single formula.
Percentage to CGPA
Type the percentage and the CGPA box fills in by the same rule turned around. This is useful for finding the CGPA that corresponds to a cut-off, for example the CGPA that equals 60% under your university's rule.
Questions people ask
How do I convert CGPA to percentage?
Use the formula of the board or university that awarded the CGPA. CBSE's class 10 rule is 9.5 × CGPA, VTU's is (CGPA − 0.75) × 10 and Anna University's is CGPA × 10.
Is multiplying by 9.5 correct for engineering CGPA?
Only if your university has adopted it. The 9.5 comes from a CBSE circular for school classes 9 and 10. Check your own university's regulations.
What is 8.5 CGPA in percentage?
By the CBSE rule 80.75%, by the VTU rule 77.5% and by the Anna University rule 85%. It depends on whose CGPA it is.
My university has no conversion formula. What should I write?
Write the CGPA with its scale, such as 8.5 out of 10, and attach the grade card. If a form demands a percentage, ask the organisation which method it accepts.
Check with your board or university. The rules quoted on this site were read in the official documents on 12 November 2026. Boards and universities revise them, and yours may differ. For anything that decides an admission or a job, use the rule printed on your own mark sheet or in your institution's regulations. This is an independent site.