A. Many standard retirement planning assume living to age 100. But if you want a more precise number, you can use one of the following free online tools:
You answer a series of questions and it will give you the answer.
Its interface is more user-friendly and has fewer questions, but it does take into account your socialeconomic status.
It claims to be the most accurate life estimator available, although you have to provide an email to proceed which should be fine as the other tools will require your email address in the end of the process anyway.