The Rule of 72

When investing everyone wants a great return on their money. The Rule of 72 will allow you to determine an estimate on how many years it will take you to will double your money.

Simple:
Take 72 and divide it by your annualized return on investment.

Example:

72/8% annualized return = 9 years.

Be aware this is a simple way of estimating but is not exact.

For this example, the exact number of years would be 8.043 years.