Hey vs224 - good questions, thanks for reaching out to EssaySnark about them!
Here's some answers for ya:
1. You don't need to worry about translating your academics to the 4.0 system for your applications to bschool. The schools all know how to interpret different grading systems and they understand how Indian schools work and the relative quality of the various institutions, in order to properly assess your previous degrees. When people go through our
Comprehensive Profile Review we do a rough estimation of what the academics would translate to, based on scores and ranking (if known) and the schools and degrees (apologies for the obvious upsell but the service is quite valuable for people who are just starting out the process, as you seem to be! if you want to go for it then
you can get a $10 discount offered only to GMAT Club members by clicking through from this page.)
Bottom line though: You don't have to translate your grades in order to apply; the only reason to do so is if you want to know how you might stack up against the competition and the school's average. Most top schools have an average GPA of 3.4 or 3.5 (even higher at HBS and Stanford) and it can help to know where you'd stand in that context. But, you can also figure this out just intuitively: If you did well in school, then you don't have to worry about it. If you know that you were a slacker then it's another story!

2. You totally don't have to have a "business" background to make it into a good MBA program, but there are specific challenges, for sure. The biggest one is simply that your profile is so common - there's lots of others with a similar set of facts in their backgrounds and it's sometimes difficult to break out of the pack and be noticed.
For an Indian IT applicant, you need to have a good reason for wanting the MBA - and this comes down to the career goals. And, you need to show how you're ready for it, not necessarily based on past marketing or accounting classes (though that could help) but instead by showing how you have been more than "just" an IT guy. You need to demonstrate that the MBA is the right next step for you and that you will be able to take good advantage of it - and you'll be able to add to classroom discussions and contribute to the experience of your peers. This is the challenging part.
Again we're being lame and doing another upsell but... we wrote a whole book on this! The Indian's Guide to Getting In is designed to help people like you to self-assess the profile, understand the challenges, and figure out how to position themselves in the best light possible in order to make it into a top MBA program in the US or Europe.
You can read about it here.We also have a gazillion resources available absolutely for free - here's an assortment to get you started:
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Posts on Engineers going to bschool*
Posts on Indians going to bschool (some overlap with the above for obvious reasons)
A lot of our Success Stories are from people with profiles very similar to yours -
here's one in particular that you reminded us of -- oh wait
here's another one too -- as you can see, people make this transition all the time! But you can also see from those stories that it is NOT easy. Be prepared for a lot of work and plan to devote a whole bunch of time and energy to this.
Hopefully that helps get you started - please let us know if there's other stuff we can tackle for you. There's definitely a way to do this and the MBA can totally change your life so it's a great thing to pursue.
Best of luck!
EssaySnark