IIT Kharagpur is one of the oldest IIT Institute in India. It has an excellent placement cell as all the IITs. Almost 85% percent students got placed in previous few years. Five students from IIT Kharagpur bagged offers exceeding INR. 1 Crore per annum on the very first day of the placements of 2019-20. As per your query this is the best package offered to students.
Now coming to the average package offered. CSE dominated the CTC offered amongst all the branches with an average CTC of above 30 LPA. Mechanical Engineering bagged the highest number of offers with an average package of 20 LPA. Top recruiters included Google, Flipkart, JP Morgan, Apple, EXL Services, Quantiphi Analytics, Barclays GSC, OYO, etc.
The lowest package varies. But on an average all the students get placement with a standard CTC. As KGP IIT is one of the oldest and well established IIT undoubtedly it is having an excellent placement cell that helps to offer the best opportunities to the students.
The placement is percentage is almost 75% in the mechanical engineering branch of IIT Kharagpur. The average package is around 12 LPA. Top recruiters are usually Mercedes, Tata Motors etc .
The highest salary offered is around 32 lacs based on previous years data and the lowest being 7 lacs.
The highest package number changes every but the highest for mechanical engineering ranges from 35-40LPA. The average for mechanical engineering is 15-18 LPA and the lowest is 6LPA. It also depends on what type of company you will get, for example there are many mechanical engineering students who get placed in investment banks like Deutche and Barclays and they offer package ranging from 50-70LPA.
I hope this this helps.