You can do a few things to calculate your estimated life expectancy. One way to calculate your life expectancy is by using an online life expectancy calculator. These calculators will ask you various questions about your age, health, lifestyle, and family history to estimate how long you'll live. Another way to estimate your life expectancy is by consulting with a doctor or other health professional. They will be able to take into account all of the factors that play into lifespan and give you a more accurate estimate. Regardless of your chosen method, it's important to remember that life expectancy estimates are just that - estimates. Your actual lifespan could be shorter or longer than the estimate, so it's important to plan and save accordingly.