Double Your Money

Figure out how long it will take your money to double at a given interest rate.

Here's how it works:

Divide the interest rate into 72. Your answer is roughly the number of years needed for your investment to double. Like this:

         72          = years
  interest rate

For example, if you are earning 5% interest, you would divide 72 by 5. The time needed to double your investment is 14.4 years.

To find out how fast your investments will double, enter the numbers. %