Hello suman,  thanks for connecting with career360. We hope we will solve your query. 

It's depends on your category, home state etc. If you are from General category than you need  160+ to only get admission at NITs. It's also vary if you are from another state. Than you need more marks. If the rank of your NIT is on the top than you also need more marks. 

Similarly,  if you are from OBC than you need, 120+ to get admission in NiTs . It's also vary according to the above parameters. 

If you are from SC category than you need 95+ marks to get admission in NITs. It also vary according to the above parameters. 

Best of luck for your future Suman.