Cutoff mark can not be predicted exactly because it depends upon various factors.

You can go through the below-provided link of Careers360 where you can find predicted cutoff score by various institutes and check previous year cutoff for various NITs.

Link to the page:- https://engineering.careers360.com/articles/jee-main-cutoff

All the very best and good luck.

Dear aspirant;

For OBC category, upto AIR 40000(GENERAL RANK) , people get in NITs. And for that rank marks of around 150 & CBSE BOARDS % around 91-92% is needed. As ur marks increase u require less borads % and vice versa.

All the best.