You can calculate your rank in JEE Main Paper 1 using the formula:

Rank = (100-percentile)*(No. of students appeared for the examination)/100

As the no. of students appeared for Paper 1 (Jan) are around 869000, your rank will be around 52000. However as the no. of students in April changes, your rank will change according to that.

With this rank, there are some chances of getting admission in NIRMA University, Ahmedabad but if you have state quota or any other reservation for this university, then the chances of getting mechanical in this university increases.

You can check the last years' cutoffs for this university using the link provided below:

https://engineering.careers360.com/articles/nirma-university-btech-admissions

For more information regarding counseling, cutoffs, etc.. you can use the B.Tech companion from the link given below:

https://www.careers360.com/btech-companion