Hello student you can calculate and get your rank by using this formula.

100 - (your total percentile) 869010 /100

In your case your rank must be around 91506.

Your rank may increase as number of candidates increase in July examination..cut off vary every year on various factors like the level of question in the entrance examination and total number of applicants in that examination..

Its difficult to get admission in NIT's with this rank as we all know that seats are very limited and admission is directly based on merit rank.

Feel free to comment if you have any doubt

Good luck