Dear aspirant,

As you have mentioned that you have secured 81 percentile and taking into consideration that you belong to ews category so let me tell your your predicted all india rank would be around 2-2.5L.

But your ews rank can't be predicted because it depends on certain factors like number of candidates appearing in the examination number of vacant seats in college, previous years cut offs and difficulty level of the paper.

For more information you can check out the link given below-

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