hey ankit,

you can calculate your approximate JEE main ranking by using careers360 JEE main rank predictor by filling in your details. however rank predicted by rank predictor is not totally reliable it just gives an approximate rank and an wague idea about your ranking.

you can check your JEE main rank by visiting the fallowing website https://engineering.careers360.com/jee-main-rank-predictor

hope this information helps .

all the best...!!