hi nishant vikal,

i suggest you to go through this link,where you'll able to get an article.

• https://engineering.careers360.com/articles/jee-main-answer-key 

scroll down,there you'll able to see the steps to use jee main answer key to calculate score.

you can make use of it.

all the best!!

note:if any links available,copy and paste it in the url bar of your browser.

I Hope this information will be useful to you.

if you need additional information,let us know to help you.

Thank you!!!:)