Retirement Assets Calculator
This calculator estimates the amount assets needed prior to retirement. It takes you're desired income in retirement, the number of years you need your money to last, the rate of inflation expected, and the rate of return you expect to receive post-retirement.
This calculator assumes you take your initial desired withdrawal in the first year and that every year after, you increase your withdrawal at the rate of inflation.
This calculator could also be used to calculate intial assets needed to draw on for purposes other than retirement. For example, the amount of money you need to save to send a child to college.