The online Rule of 72 Calculator is used to calculate how many years it will take for your investment to double at a constant coumpound interest rate by using rule of 72.
In finance, the rule of 72 is a quick and easy way to calculate how long it will take you to double your investment.
For a constant interest rate, the approximate number of years that it will take for your investment to double is estimated by the following rule of 72 formula:
72 / Interest Rate = Years
For example, if you invested $100 at 4% interest, it will take you about 72/4 = 18 years to double your investment to $200.