Hello dear student,

There are many colleges in tamilnadu who accept jee mains marks . Few of them are -

• VIT University Vellore
• SRM University Chennai
• Sastra University
• Sathyabama University Chennai
• Hindustan Institute of technology and science Chennai
• SRM University Chennai ramapuram campus
• Karunya University Coimbatore

If you want to calculate your rank by your own then dear student you can do it as 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 1200000 then your final rank shall be (100 - your total score) X 1200000/100

I hope this information is helpful for you

Best wishes