Your rank can be predicted by using the formula, (100-your total percentile)*869010/100. In your case, your approximate rank would be 63698. Let's say the number of candidates for April exam increased to 12,00,000 then your final rank shall be (100 - your total score) X 12,00,000/100. You haven't mentioned your Category and so it is difficult to predict your chances at NITs.  Please check our page for cut offs for NITs of previous years: https://engineering.careers360.com/articles/jee-main-cutoff .

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