Rule of 72 Calculator
Rule of 72 Calculator calculates how long it will take to double your money or investment given an interest rate. Rule of 72 states that the years required to double your money at a given interest rate, simply divide the interest rate into 72.
Exact Answer 
14.21 
Rule of 72 Estimate 
14.40 
What is the Rule of 72?
What is The Rule of 72 or the rule of 72 formula is a quick and easy formula to estimate the number of years it takes to double an investment given an annual rate of return.
The rule of 72 formula given below
Years to Double Your Money = 72/Interest Rate
For example, to find out how long it will take to double your money givin an interest rate of 5%, simply divide
72/5 = 14.40 which is very close to the actual value of 14.21.
