Hlo, If you get score of 30% then you will get 50,000+ rank. You can get Low rank NIT if you have state quota but if your state NIT have decent Ranking and if  you are from general category than you can't get seat in any branch.But if you are from OBC than you can get lowest branch. If you are from SC than you will get good branch but don't get CSE.

If you are scoring 30%, then you should expect a rank of above 50,000.

Good luck...!!

Dear Aisha,

According, to previous year if you score 30% in your JEE Main exam your rank will be around 62,000.

Good Luck!!