Hello dear student,

It’s difficult to predict actual rank or JEE advanced qualify marks. you may calculate your expected rank by this formula.

your total percentile score is the percentage  of people ahead of you. 869010 are the number of candidates appeared for Jan exam.

So rank formula is (100 - your total score) X 869010 /100. If the number of candidates for April exam increased to 1700000 then your final rank shall be (100 - your total score) X 100000/100.

i hope this helps

best wishes