Hi there,
Hope you are doing well.
NTA has already released the ranks along with the percentile in the result sheets.
But you can also calculate it by yourself in the following way:-
rank= ( 100 - percentile ) * ( No. of total students appeared / 100)

The total number of students appeared for this time was around 1,22,300.
So, your approx. rank would be ( 100- percentile )* 1223

Hope it would help.
Thank You.