Click the button to start

How long will it take:

to grow into  
if it is invested at
compounded ?

Work the problem on some paper...
When you're done, click on the answer below.
But, don't look at it before you've really tried it on your own!


If you're off by the last decimal place, it's just because my program rounds differently than
your calculator...  If you're off by more than that,
you are making rounding errors!