Hello Aspirant,

It would be difficult to tell you the qualifying cutoff & admission cutoff. But a score of more than 85 percentile, You should have decent chance to qualify the exam for JEE Advanced eligibility.

You may also calculate your expected rank by this formula, If you have your JEE Main percentile.

100 - your total percentile score is the percentage of people ahead of you. 874469 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 1200000 then your final rank shall be (100 - your total score) X 1200000/100.

Good Luck!