Finance
Rule of 72
How many years for your money to double.
Years to double
9
Years to triple (rule of 114)
14.3
Years to quadruple (rule of 144)
18
How it works
Estimate how many years it takes for your money to double at an annual rate using the Rule of 72.
Divide 72 by the annual rate. At 8%: 72/8 = 9 years. Rule of 114 triples it, rule of 144 quadruples.