It is crucial to have an understanding of stamp duty if you are interested in buying a property in Bengaluru. Too many buyers walk in blind, and then get shocked when the paperwork hits them. The quickest way to calculate the stamp duty is, of course, to use an online calculator. It asks for location, gender, and property value. You punch it in, and out comes the number. But some people still want to know the math behind it, and understand how the final figure is arrived at.