Hey sudhansu! 

Jee main cutoff for NiT's is based on jee main qualifying marks and all India ranks. 

The cutoff varies as per category and programs offered. The allotment of btech Seats in nit will be purely based on jee main cutoff.

The expected jee main cutoff can be predicted in the previous years cutoff

The jee main cutoff for nit 2018 - 

General - max marks : 350 min marks : 74

Obc - max marks : 73 min marks : 45 

Sc - max marks - 73 min marks : 29

St - max marks - 73 min marks : 24

Wish you all the best.

Helloo...

First of all congratulations to your score in the Gate .

You have good chances of getting the seat in  national institute of industrial engineering.

All the best...