Hi aspirant

There are a lot of things on which cut off depends and this is the reason why cut off varies every year.

The difficulty level of the question paper ,number of students appeared ,number of seats at IITs together fluctuates the cut off.

The cut off the year 2019 is not yet out.But we have detailed opening and closing rank for each branch .

Civil :2525-3748

Computer science:51-200

Electrical:216-568

Mechanical:689-1333

Aerospace:1270-2706

You have to be in top 1000 to get your choice branch. 

Visit the link to know more in details:https://engineering.careers360.com/articles/jee-advanced-cutoff-for-iit-madras

Hope this was helpful.