All the 3 IITs, IIT Kanpur, IIT Bombay and IIT Delhi, follow the relative grading. Under this, your grades are calculated after your GPA is generated with respect to the highest scorer's marks. This system is quite similar to that in the US except that the parameters considered while calculating grades are way different.
Grades are calculated by giving weightage to such parameters
IIT B and IIT D grading system looks like this
Grade |
Marks |
AA or AP |
10 |
AB |
9 |
BB |
8 |
BC |
7 |
CC |
6 |
CD |
5 |
DD |
4 |
DE |
3 |
EE |
2 |
Anything below this is considered Fail.
IIT Kanpur has an even grading system which looks like this
Grade |
Marks |
A* |
10 |
A |
10 |
B |
8 |
C |
6 |
D |
4 |
E |
you haven’t passed the course but you are eligible for taking such courses whose prerequisite was this course |
F |
Fail |
Contrastingly, AP in IIT Bombay means excellent performance where AP in IIT Kanpur means Academic Probation. But still, I think IIT Kanpur is good to go with.