Dear Aspirant, due to varying trends and multiple question papers of JEE Mains it's quite difficult to predict rank from marks....

Here is the link for JEE Mains Rank predictor which will  predict according to your date of exam  :

This would tell you a range of percentile according to marks. Once you get percentile range you may use the same link using percentile option to predict rank.

Now once you have the idea of rank you can use this to have a idea of options of colleges you have :

Hope this helps. All the best!