BITS Pilani conducts its own entrance test, BITS Aptitude Test (BITSAT), to admit students to its various engineering and science programs offered by its three campuses at Pilani, Hyderabad, and Goa. Generally, it is seen that the cut-offs of the first round of counseling are very much high. This is because many students tend to leave the institute after they get admission at some IITs or NITs or any other college of their choice.
The cut-offs decrease significantly in the second round of counseling. Now how much it will decrease is very difficult to predict at any stage. Each year the candidate pool is different. But if you look at the 1st round cut-off and the final round cut-off you will get the picture.