first thing is that from which category you belong to..if you are in general category it is quite difficult to get into IIT..but if you belong to SC ST category then you might get in to IIT.

for the perfect college predictor, you can use career360 predictor tool..link is provided below.

https://engineering.careers360.com/gate-college-predictor?icn=GATE_clgpd&ici=GATE_article_view_sticky

thankyou