Dear Sushma,

To check your chances in IITs and NITs based on your score nad category you can use below GATE College Predictor 

https://engineering.careers360.com/gate-college-predictor

Good Luck!!

To check your chances in various colleges based on your score and category, you should try careers360 college predictor and rank predictor.

Link for rank predictor:- https://engineering.careers360.com/gate-college-predictor

All the very best and good luck.