how many marks we have atleast score in jee mains for admission in iiitS or nitS colleges..

Hello
The cutoff required for admission varies from college to college depending on many factors such as the home state, category of the candidate. Kindly mention your home state, category and your percentile so we can tell you about your admission chances.

Also, for admission to top NITs, 98+ percentile would be a good score.

Good Luck!