I remember Dr. Stefanica director of Baruch, mentioning in one of the chats "We know how to convert GPA in 10 point scale to 4 point scale for students from IITs".
National Institute of Technology brand is although not recognized at par with IITs but are the second best place in India for Engineering.
Do we need to explain these things to the admissions committee? Do people from other countries do similar things?
Because I am very sure no admission committee can have the details of grading pattern and toughness of getting into for all the schools of the world. The recognized ones win the race here.
Yes, of course they will not have the info on every university, but to simply convert your GPA yourself is merely misleading, and you should not attempt it.
They will consider the university's merits, there's no need to talk about that on your app, or you just risk sounding defensive.
Anyway, the GPA is just one component of the entire application. Work experience, references, standardized test scores, your application essays, any academic papers published, the diversity you bring to the class, these are all important factors.
No one here can claim to give expert advice. But everyone who makes it into a top program has something in his or her application that stands out.
So don't get hung up on GPA's. And if you don't get in, ask the adcoms why, so you can focus on strengthening your weak points. Because 8.19/10 is a perfectly respectable GPA, but it means nothing unless the rest of you application is strong as well.