Retirement Calculators
[1] You're saving for retirement, \$A each year (or months) at an annual (or monthly) return of R%, for N years (or months)
 Annual (or monthly) Investment = \$ Try 3000/12 for monthly Annual (or monthly) Return = % Try 10/12 for monthly Number of Years (or months) = Try 30*12 for monthly Portfolio Value = \$ after N years (or months) and N investments

[2] You're retired and begin withdrawing from your Portfolio, the amount increasing with inflation. How long will it last?
 Annual Return on Investment =%   (annual increase in retirement portfolio) Annual Inflation Rate =%   (annual increase in withdrawal amount) Initial Withdrawal Rate =%   (Initial Withdrawal)/(Initial Portfolio), increasing with Inflation Years to Zero =

[3] You're saving for retirement when you'll withdraw at a specific rate. You know what salary you'll need (in today's dollars):
 Desired Salary = \$ (at retirement, in today's dollars) Years of Investing = (until retirement) Annual Inflation = % (increase in annual salary until retirement) Withdrawal Rate =% (after retirement) Portfolio Required = \$ (at retirement)

[4] To achieve a specific portfolio at retirement, what percentage of your current salary will you have to invest?
 Years of Investing = (until retirement) Current Salary = \$ Portfolio Required = \$ (at retirement) Current Portfolio = \$ (if any) Salary Increases = % (until retirement) Investment Growth Rate =% (until retirement) Percentage of Salary that you need to invest = %

[5] If you contribute a fixed amount each year, how long until you achieve a specific portfolio?
 Annual investments = \$ Portfolio Required = \$ Current Portfolio = \$ (if any) Investment Growth Rate =% Years required until specified Portfolio is attained = years

[6] If you can live on a specific percentage of your current salary, at retirement, how long will your portfolio last?
 Current Salary = \$ Percentage of Current Salary Invested = % Current Portfolio = \$ Annual Salary Increases = % (until retirement) Investment Growth Rate = % (before and after retirement) Years of Investing = (until retirement) Percentage of Salary that you want = % (after retirement) Inflation = % ( = increase in after-retirement withdrawals) Years until Portfolio runs dry = years after retirement
If you get a result NaN (Not a Number!), it means your portfolio will last forever (!)

What are your chances of becoming an octogenarian :^) ?
(Based upon 1997 U.S. Dept of Health figures)