Rule of 72 Calculator
Find out how long it takes to double your money at a given annual return using the Rule of 72 β plus the exact compounding answer.
Result
Enter values to see the result.
How to use the Rule of 72 Calculator
- 1Enter your Annual return (in %).
- 2The result and full breakdown update instantly β no signup, no waiting, and your numbers never leave your browser.
About the Rule of 72 Calculator
Find out how long it takes to double your money at a given annual return using the Rule of 72 β plus the exact compounding answer. It's a free tool in our market data tools collection on TheCryptoTools, runs entirely in your browser, and works on mobile. If you found it useful, try Funding Rate Calculator, Market Cap Price Calculator and Bitcoin Halving Countdown.
Frequently asked questions
οΌWhat is the Rule of 72?
Divide 72 by your annual percentage return to estimate the number of years it takes an investment to double. At 10% a year, money doubles in about 7.2 years.
οΌHow accurate is it?
It's a close approximation for rates between roughly 5% and 15%. Outside that range the exact compound formula (shown here) is more reliable.
οΌWhere do 114 and 144 come from?
The same idea extended: 114 estimates tripling time and 144 estimates quadrupling time.
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For educational purposes only. Rule of 72 Calculator results are estimates, not financial advice.