Some applications ask for a CGPA when you only know your percentage, especially when comparing results across boards. This calculator reverses the most common Indian conversion rules so you can quote a 10-point CGPA quickly and consistently.
Enter your percentage.
Choose the rule used by your board or university.
Read the indicative CGPA.
CBSE: CGPA = Percentage ÷ 9.5
Universities: CGPA = Percentage ÷ 10 + 0.75
Some forms work the other way round: they want a CGPA on a 10-point scale while your marksheet shows a percentage. This happens when state-board and CBSE results are compared, when a university admission portal accepts only CGPA, or when an older degree was marked in percentages. The calculator reverses the common Indian conversion rules to give an indicative CGPA.
Three rules are available: percentage ÷ 9.5 (the reverse of CBSE's rule), percentage ÷ 10 + 0.75 (the reverse of the common university rule) and a plain ÷ 10. The answer is capped at 10.
The result is a comparison figure. It is not a CGPA your board or university has awarded, and it should be labelled as converted wherever you use it.
1. Take your aggregate percentage from the marksheet, not a subject percentage.
2. Pick the rule that the receiving institution or your own board uses.
3. For the CBSE rule, CGPA = percentage ÷ 9.5.
4. For the university rule, CGPA = percentage ÷ 10 + 0.75.
5. For the simple rule, CGPA = percentage ÷ 10.
6. If the result exceeds 10, cap it at 10, and round to two decimals.
Each forward rule is a straight line: percentage = a × CGPA + b. Solving for CGPA gives CGPA = (percentage − b) ÷ a. For CBSE, a = 9.5 and b = 0, so CGPA = percentage ÷ 9.5. For the university rule, percentage = 10 × CGPA − 7.5, so CGPA = (percentage + 7.5) ÷ 10, which is percentage ÷ 10 + 0.75. Because the lines are exact inverses, converting forward and back returns the original number, apart from rounding.
Under the CBSE reverse rule, any percentage above 95 gives a CGPA above 10, which is impossible on a 10-point scale, so it is capped. Under the university reverse rule, the cap is reached at 92.5%. This does not mean such scores are equal; it means the rule was designed as an average for bands, and the top band cannot express differences inside it. When two applicants both show 10 after conversion, their original percentages are the better comparison.
A real CGPA comes from grade points assigned to bands of marks, for example 91 to 100 for the top grade, and then averaged with credits. Two students with the same percentage can have different CGPAs if their marks fall differently across bands and subjects. So a converted CGPA can differ by several tenths from what a grading system would actually have given. For admissions that set a cut-off in CGPA, check whether the institution accepts converted figures at all.
Harpreet scored 76.5% in her state-board Class 12 exams, and a college portal that expects CBSE-style grading asks for an equivalent CGPA using the 9.5 rule.
Reverse the conversion rule: 76.5 ÷ 9.5 = 8.05 (capped at 10)
Answer: Equivalent CGPA 8.05
Using a subject percentage instead of the aggregate.
Choosing the ÷ 10 + 0.75 rule because it gives a higher CGPA, when the form specifies CBSE's rule.
Presenting the converted value as an official CGPA on a CV without saying it is converted.
Assuming that two applicants who both show 10 after conversion had the same marks.
Filling admission portals that accept only CGPA.
Comparing a percentage-based state-board result with a CBSE grade card.
Expressing older percentage-based degrees in CGPA for job applications that ask for it.
Counsellors explaining equivalences to parents and students.
What CGPA is 90 percent?
With the CBSE rule it is 90 ÷ 9.5 ≈ 9.47. With the university rule it is 9 + 0.75 = 9.75.
Should I write this CGPA on an official form?
Only if the form asks for a converted value. Otherwise quote the CGPA printed on your marksheet.