No. Online pain and suffering calculators are not accurate. They often use basic calculations that you can do yourself. Additionally, there is no guarantee that the number the calculator estimates for your claim will be what an insurance adjuster or jury will award.
Rather than relying on these calculators, turn to an experienced car wreck lawyer in Indianapolis who is familiar with the types of settlements and awards that are more typical for the type of injury you suffered. Also, keep in mind that every case is unique, so there is no 100% accurate way of predicting how much your case might be worth.