Try using Career 360's awesome feature of rank predictor! I did the same and my rank was very appropriate! 

Hii..

According to me,Your expected rank will be around 1,00,000-1,50,000.

You can check your expected rank through this link:-

https://engineering.careers360.com/jee-main-rank-predictor?utm_source=google-search&utm_medium=paid&utm_campaign=jeemain-rp

Thanks..!!

Candidates can check the answer key of JEE Main 2018 from below provided links:-

Link for all sets question paper and answer key:- https://engineering.careers360.com/articles/jee-main-answer-key

The correct responses in the answer key have to be compared to the response sheet of yours.

You need to follow the official marking scheme to calculate the probable scores of JEE Main 2018.

Correct answer:- +4 marks

Wrong answer:- -1 mark

If you have calculated your JEE Main scores, head over to Carers360 rank predict to predict your ranks.

Link to the page:- https://engineering.careers360.com/-articles/jee-main-rank-predictor

( However, the candidates will have to remember that the data is indicative in nature. )

All the very best and good luck.

Dear Ankush,

Your expected Rank based on your score will be approximately between 72000 - 77000.

Also, You can register for B.tech companion to know your chances in NITs/IIITs with previous year cut off by below link:
https://www.careers360.com/btech-companion

Good Luck!!