hey abhinav ,

JEE mains result will declare markings and rankings on april 30 2019 ( tentative ) .

until that you can check your JEE main ranking and percentile on careers360 JEE main rank predictor by entering necessary details .

click on the fallowing link to directly to visit careers360 JEE mains rank predictor and predict your approximate ranking . https://engineering.careers360.com/jee-main-rank-predictor

hope this helps.

good luck ..!!