Source: JNTUH R22 B.Tech Academic Regulations (official PDF) . Quoted from clause 11.2 of the R22 B.Tech Academic Regulations. Checked 22 August 2026. Always confirm against your own marks memo before using this on an application.
| Grade | Grade points | Marks range |
|---|---|---|
| O | 10 | 90% and above |
| A+ | 9 | 80% to below 90% |
| A | 8 | 70% to below 80% |
| B+ | 7 | 60% to below 70% |
| B | 6 | 50% to below 60% |
| C | 5 | 40% to below 50% |
| F | 0 | Below 40% (Fail) |
| Ab | 0 | Absent |
Important: there is no single CGPA-to-percentage formula in India
This is the part most calculators online quietly skip, and it matters more than the calculator itself.
Different Indian universities publish different conversion rules. Some subtract 0.5 before multiplying by 10. Some subtract 0.75. Some multiply by 9.5. Some publish no official conversion at all and expect you to submit your CGPA as-is.
The calculator above uses the JNTUH R22 formula, quoted directly from the university’s own academic regulations. If you are not on a JNTUH course, do not assume it applies to you.
The JNTUH formula, from the source
Clause 11.2 of the JNTUH R22 B.Tech Academic Regulations states:
% of Marks = (final CGPA – 0.5) x 10
So a CGPA of 8.4 converts to (8.4 − 0.5) × 10 = 79%.
Source: JNTUH R22 B.Tech Academic Regulations (official PDF).
How to find your own university’s formula
Do this once and you’ll never need to guess again:
- Search for your university’s academic regulations PDF on its own website — not on a calculator site or a blog.
- Look for the clause on award of division, classification, or conversion of CGPA. It is usually near the end, alongside the grading table.
- If no conversion clause exists, your university likely has no official percentage equivalent. In that case, report your CGPA as it appears on your memo and let the employer convert it.
Why getting this right matters
Many job applications and higher-study forms ask for a percentage, and some have a hard cut-off — 60% or 70%. Using the wrong formula can move you either side of that line.
Worse, if the percentage on your application doesn’t match what your transcript implies, it can look like you inflated it. Always cross-check against your official marks memo before submitting anything.
Common questions
Is the multiply-by-9.5 formula right? It is correct for CBSE Class 10, and it is used by some universities — but it is not the JNTUH rule and shouldn’t be applied to an engineering CGPA without checking.
Does this store my data? No. The calculation runs entirely in your browser.
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