The formula for calculating approximate rank in jee mains by using percentile is:

JEE Main 2019 rank= (100- NTA percentile score ) X 874469 /100

Hello Polana Viswanadh2 ,

To calculate you rank you can use the formulae given below -

Rank=(total number of students -(percentile*0.01*number of students))

where total number of students who appeared for the examination is 9.65 lakhs.

Hope this will help you!

All the best.

Thanku.