They can do that by going to a good retirement income calculator and plugging in such info as their current salary, savings rate and retirement account balances. (realdealretirement.com)
To get a sense of that recommended mix of stocks and bonds as well as others might affect the eventual size of your retirement stash given how much you're saving — or how long your stash is likely to last at different withdrawal rates after you retire — I suggest you also rev up a good retirement income calculator like the one in the Tools & Calculators section of RealDealRetirement's Retirement Toolbox. (realdealretirement.com)
A bonus is that Morneau Shepell also makes available a free retirement income calculator for those already retired on the cusp of retirement. (moneysense.ca)