Dear Aspirants/Guardians

 You just need to qualify JEE Mains to appear JEE Advance, IITs provide admission based on JEE Advance mark.

Cutoff rank cannot be predicted exactly because it depends upon various factors. Score varies almost every year and differs from one branch to another.It may be vary depending on question paper and cutoff rank.

You can go through the below-provided link of Careers360 where you can find cutoff rank for IIT Bombay.

Link for the cutoff rank for IIT Delhi:-https://engineering.careers360.com/articles/jee-advanced-cutoff-for-iit-delhi

All the very best and good luck.

• There is no minimum marks criteria to get into any IIT or NIT.
• Cutoff marks are announced for both JEE (Mains) and JEE (Advanced).
• The cutoff marks are decided on the basis of performance of the students.
• They are different every year as the total marks change every year.
• The question paper pattern also changes every year.

So there is no minimum marks criteria to get into the colleges. The cutoff marks are out with the results.

If you want to know about your possibility, you can take the marks percentage as a measure. Once you are done with the exam, calculate 37.5% of the maximum marks. That is the cutoff percentage. If you are scoring above that, you are qualified. But the question asks about IITB, IITD, IITKGP, and IITR, so you are not done with 37.5%. 
For that, you can go to the official CSAB website and take a look at the previous years’ opening and closing ranks. You will get an idea. 
To be on a safe side, you should score about 50% or more. This ensures that you will get a college.

Hope this helps.

There is no specific cut off for IITs as the exam pattern of Jee advanced varies year to year but to get rough idea you can go through the below provided previous year cut off trend -

https://engineering.careers360.com/articles/jee-advanced-cutoff

Good Luck!!!