Indian Institute of Technology Madras (IIT Madras)
percentage to CGPA
Indian Institute of Technology Madras (IIT Madras) — % → CGPA
Converting Indian Institute of Technology Madras (IIT Madras) percentage back to CGPA
Indian Institute of Technology Madras (IIT Madras) (Tamil Nadu) officially converts CGPA to percentage with % = CGPA × 10 (graduated 11.11.2020 onwards); 55 + 10×(CGPA − 6) for earlier graduates. This page inverts that formula so you can estimate the CGPA behind a known percentage. Enter your percentage above and the calculator solves for the CGPA on the 10-point scale.
Worked example
The official Indian Institute of Technology Madras (IIT Madras) formula is % = CGPA × 10 (graduated 11.11.2020 onwards); 55 + 10×(CGPA − 6) for earlier graduates. Starting from a percentage of 85%, the formula reverses to a CGPA of about 8.5 on the 10-point scale. You can check this by running 8.5 through the forward Indian Institute of Technology Madras (IIT Madras) CGPA to percentage calculator — it returns 85%, confirming the two directions agree.
Why this is an estimate, not an official figure
A college issues your percentage from your actual CGPA, not the other way around — so reversing the formula recovers the CGPA that would produce that percentage. When both numbers appear on your grade card, always quote the official CGPA rather than this estimate.
Source & verification
IIT Madras Senate-approved CGPA-to-Percentage Conversion certificate, F.No. Acad/Cert./2025 (01-12-2025), Dean (Academic Courses)
IIT Madras uses two Senate-approved formulas by graduation date. Graduated from 11.11.2020 onwards: Percentage = CGPA × 10 (CGPA 8.5 → 85%). Graduated up to 10.11.2020: Percentage = 55 + 10 × (CGPA − 6), which simplifies to (CGPA × 10) − 5 (CGPA 8.5 → 80%). Pick the option matching your graduation date. Note: IIT Madras does NOT use ×9.5 — recent graduates use plain ×10.
College contact
Address: IIT P.O., Chennai – 600036, Tamil Nadu, India.
Need the usual direction? Use the Indian Institute of Technology Madras (IIT Madras) CGPA to percentage calculator, or browse the full percentage to CGPA directory.