Hello student you can calculate and get your rank easily by using this formula.
100 - (your total percentile) 869010 /100.
In your case your rank must be around 2693
Predicting exact cut off is bit difficult as vary every year on various factors like the level of question in the examination and total number of applicants in that examination.
But on past year records you'll easily get into
NIT calicut
MNIT allahbad
NIT Delhi.
Please help me with your domicile and category so that I can provide you more exact information as its plays very important role.

For more updates refer to the link mentioned below
https://www.google.com/amp/s/engineering.careers360.com/articles/nits-cutoff-for-b-tech-computer-science-and-engineering/amp

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