Dear Aspirant,

It is quite difficult to predict the exact cutoff situation as it depends on the difficulty level of the paper, the number of students attempting the exam and the preferences of the students.

Generally, for your category if you get 100 + marks out of 180 you have a good chance of getting IISER Pune, Kolkata, Mohali

85 + would fetch you Thiruvananthapuram, Tirupati and 70 + for Bherampur, Bhopal.

This is just a rough sketch, the cutoff is constantly increasing as the competition for IISER is also increasing.

Hope this helps