Hi

With  81.11 percentile

• Your rank will be  around 193245 - 217235  as per our rank predictor at

  JEE Main Rank Predictor 2021 - Predict your JEE Main ...

  JEE Main Rank Predictor - Know your expected IIT JEE Main 2021 Rank by ...

Your sc rank will be around  12k

With above  rank, you have a bit low chances in NITs .

For example

Under other state quota closing rank for some of the lower NIT for SC category is provided below as 6th josaa counselling 2020 :-

• NIT Mizoram :- civil engineering :- 8376 sc rank

• Nit nagaland :- Electronics and Instrumentation Engineering:- 8641  sc rank

• National Institute of Technology Agartala, Production Engineering :- 9207 sc rank

You can verify the above at

https://josaa.nic.in/Result/Result/currentorcr.aspx

Try to get at least sc rank of around 9000 i. e at least around 85 percentile to get into NITs

With your rank you have some chance in GFTIs :-

• Assam University, Silchar, Agricultural Engineering (4 Years, Bachelor of Technology):- 12232 Sc rank

• Central University of Rajasthan, Rajasthan:-Bio Medical Engineering (4 Years, Bachelor of Technology):-12717 sc rank

Above prediction of is on the basis of past year data but  cut off/closing rank for colleges keeps changing every year depending upon many factors like number of students that appeared in the examination, difficulty level of the JEE main question paper for different shifts etc

To have a personalised report on your chances of getting a college you can go through our college predictor, it will give you complete list of colleges which you can get on the basis of the category you belong to,  your home state, your gender etc, the link for  jee main college predictor is provided below

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

To improve your score in your remaining attempts of JEE main you should focus on your preparation go through previous year question papers ,mock test papers and to help you in your preparation we have jee main knockout out for you, for which  is provided below

https://learn.careers360.com/knockout-jee-main

Thankyou