In the not really broad sense, it's an online asset for job seekers, career changers, and employees to contrast their salary with others in their field, their industry, their city, or even their own company. What's awesome about it is that you can accomplish more research into your current situation and also predict around what your future income could be.
Relatively few calculators work in India, because of the uneven market and savage rivalry. Here are the 2 salary calculators we could find and they work pretty well...
Glassdoor utilizes compensations submitted to them to give you an idea of the amount you may make in a specific part and area, or even at a particular company.
Use PayScale's salary calculator to see how your salary measures up. Whether you're relocating to a new town, considering a new position, or negotiating a raise, knowing how much you're worth as a professional can help you make sure you're compensated fairly for the work you do.
Obviously the calculators are just in the same class as the honesty of its users in reporting their salaries. Still, it may be a decent place to begin to get rough approximations on what you should make.