Inflation & Retirement Estimate how much income may be needed at retirement to maintain your standard of living. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Related Content The Rule of 72 Do you know how long it may take for your investments to double in value? The Rule of 72 is a quick way to figure it out. Coaches Coaches have helped you your whole life, in ways big and small. We'd like to be one of them. Pay Yourself First It sounds simple, but paying yourself first can really pay off.