The full conversion chart for JNTUH R22, every CGPA from 4.0 to 10.0. Every row is calculated from the university’s own formula, so no row can quietly disagree with it.
If you only need one value, the calculator is faster:
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 |
The complete table
Each row is linkable — you can send someone straight to a value, for example 8.5 or 7.2.
| CGPA | Percentage of marks |
|---|---|
| 4.0 | 35% |
| 4.1 | 36% |
| 4.2 | 37% |
| 4.3 | 38% |
| 4.4 | 39% |
| 4.5 | 40% |
| 4.6 | 41% |
| 4.7 | 42% |
| 4.8 | 43% |
| 4.9 | 44% |
| 5.0 | 45% |
| 5.1 | 46% |
| 5.2 | 47% |
| 5.3 | 48% |
| 5.4 | 49% |
| 5.5 | 50% |
| 5.6 | 51% |
| 5.7 | 52% |
| 5.8 | 53% |
| 5.9 | 54% |
| 6.0 | 55% |
| 6.1 | 56% |
| 6.2 | 57% |
| 6.3 | 58% |
| 6.4 | 59% |
| 6.5 | 60% |
| 6.6 | 61% |
| 6.7 | 62% |
| 6.8 | 63% |
| 6.9 | 64% |
| 7.0 | 65% |
| 7.1 | 66% |
| 7.2 | 67% |
| 7.3 | 68% |
| 7.4 | 69% |
| 7.5 | 70% |
| 7.6 | 71% |
| 7.7 | 72% |
| 7.8 | 73% |
| 7.9 | 74% |
| 8.0 | 75% |
| 8.1 | 76% |
| 8.2 | 77% |
| 8.3 | 78% |
| 8.4 | 79% |
| 8.5 | 80% |
| 8.6 | 81% |
| 8.7 | 82% |
| 8.8 | 83% |
| 8.9 | 84% |
| 9.0 | 85% |
| 9.1 | 86% |
| 9.2 | 87% |
| 9.3 | 88% |
| 9.4 | 89% |
| 9.5 | 90% |
| 9.6 | 91% |
| 9.7 | 92% |
| 9.8 | 93% |
| 9.9 | 94% |
| 10.0 | 95% |
Source: JNTUH R22 B.Tech Academic Regulations (official PDF) . Every row is calculated from % of Marks = (final CGPA − 0.5) × 10 — Quoted from clause 11.2 of the R22 B.Tech Academic Regulations. Nothing in this table is typed by hand, so a row cannot disagree with the formula. Checked 22 August 2026.
How the number is arrived at
Clause 11.2 of the R22 B.Tech regulations states the conversion as:
% of Marks = (final CGPA − 0.5) × 10
So for a CGPA of 8.5: subtract 0.5 to get 8.0, multiply by 10, and the answer is 80%. The 0.5 deduction is why a CGPA of 8.5 is not simply 85% — a mistake worth catching before you type a number into an application form.
The same rule rearranged runs the other way: CGPA = (percentage ÷ 10) + 0.5. A 70% converts back to a CGPA of 7.5.
Two things this table cannot do for you
It is JNTUH’s rule, not a national one. There is no single Indian formula. Anna University, VTU, Mumbai University and CBSE each publish their own, and the popular “multiply by 9.5” shortcut belongs to CBSE class 10, not to engineering. Using this table for a different university will give you a wrong number that looks entirely plausible.
It converts a final CGPA. Clause 11.2 is written for the CGPA at the end of the programme. A mid-course CGPA converted this way is an estimate of where you stand, not a figure to certify.
Before you use this on a form
Employers and universities will ask for the percentage printed on your official marks memo or provisional certificate. If what the university has printed differs from what this table says, the printed document wins — always. Use this to know roughly where you stand and to check the arithmetic, not as a substitute for the document.
Related
- CGPA to percentage calculator — the single-value version, with the sourcing explained.
- Percentage to CGPA — the reverse conversion.
- CGPA calculator — work out the CGPA itself from credits and grades.
- Target CGPA calculator — what you need from your remaining credits to reach a number.