The rule of 72 is a method used in finance to quickly estimate the doubling or halving time through compound interest or inflation, respectively.

For example, using the rule of 72, an investor who invests $1,000 at an interest rate of 4% per year, will double their money in approximately 18 years.

## What are some examples of how you can use Rule of 72?

Examples: At 6% interest, your money takes 72/6 or 12 years to double. To double your money in 10 years, get an interest rate of 72/10 or 7.2%. If your country’s GDP grows at 3% a year, the economy doubles in 72/3 or 24 years.

## How does the 72 rule work?

The Rule of 72 is a simple way to determine how long an investment will take to double given a fixed annual rate of interest. By dividing 72 by the annual rate of return, investors obtain a rough estimate of how many years it will take for the initial investment to duplicate itself.

## How do you calculate Rule of 72?

The rule says that to find the number of years required to double your money at a given interest rate, you just divide the interest rate into 72. For example, if you want to know how long it will take to double your money at eight percent interest, divide 8 into 72 and get 9 years.

## What is the meaning of Rule of 72?

The Rule of 72 is a quick, useful formula that is popularly used to estimate the number of years required to double the invested money at a given annual rate of return. Alternatively, it can compute the annual rate of compounded return from an investment given how many years it will take to double the investment.