<prompt> Human: Im just trying to do a very rough estimate of how much what I currently have in retirement is expected to grow over the next 30 years or so. Mostly in Vanguard TSMI and Vanguard International Global Fund.Ive heard 737; is the standard for these things based on recent history. Of course, past results are not future guarantees.  <response>: The quick and answer is: who knows? You cant control the return youre going to get. You can only control your savings rate and the management fees you pay. Concentrate on that. 