Rule of 72 Calculator

What is the Rule of 72?

The Rule of 72 is a simple and quick way to estimate how long it will take for an investment to double in value, given a fixed annual rate of return. By dividing 72 by your expected annual return percentage, you get the approximate number of years needed to double your money. This rule is popular among investors and financial planners for its ease of use and mental math simplicity.

While the Rule of 72 is an approximation, it provides fairly accurate results for interest rates between 6% and 10%. For more precise calculations, the exact doubling time formula using natural logarithms can be used.

Simple Guide: How to Use This Rule of 72 Calculator

1. Enter Your Annual Rate of Return (%):
   Type in the expected yearly return on your investment. For example, if you expect an 8% annual return, enter "8".

2. Click "Calculate":
   Hit the calculate button to instantly see the estimated number of years it will take for your investment to double.

3. View the Result:
   The calculator will display the approximate doubling time based on the Rule of 72.