To answer this question in a single line, IIT Kanpur’s relative grading system is the absolute nightmare of the Institute. While other institutes have a continuous grading system like 10.9,8,7,6,5 and so on, IIT Kanpur follows a relative grading system. Under this grading is done in this manner:
The discontinuity in grade points becomes a major issue when applying for higher education or off-campus placements. When you will be evaluated among other IITians you will see students with a 9 which is the usual criterion for placements. But at IIT Kanpur you can either get a 10 or an 8. The same issue arises for applying for MS covert or IIMs.
Basically, someone with an 8+CGPA will be given a 10-grade score while someone with an 8 CGPA will get a 7 rating score thereby reducing the chances of getting a call from B schools.