The cut off varies college,category and homestate wise so kindly mention the complete details and in case you waat to get admission in top NITs in top branches like CS,ME,ECE etc then the safest score would be 230-270 so plan and prparare really well so that you can achieve your target.

Also, you can refer previous year jee main cut off to get a rough idea about the rank range -

Jee main cut off 2017

Good Luck!!!