Rule of 72 Calculator
Estimate how long it takes an investment to double.
Result
Results are estimates for general information only and are not professional advice.
The Rule of 72
The Rule of 72 is a quick way to estimate how many years it takes to double your money: divide 72 by the annual return rate. This calculator shows the Rule of 72 estimate alongside the exact doubling time.
Frequently Asked Questions
What is the Rule of 72 Calculator?
Estimate how long it takes an investment to double. It runs instantly in your browser and is completely free.
Is the Rule of 72 Calculator free and does it require signup?
Yes. Every calculator on Calculatis is 100% free with no registration, and the values you enter are never stored.
How accurate is the Rule of 72 Calculator?
It uses standard, widely-accepted formulas. Results are reliable estimates for general use and are not a substitute for professional advice.