Rule of 72 Calculator
Quickly estimate the number of years required to double your money at a given fixed rate of return.
At 8% annual return, your investment will double approximately every 9 years.
Burnjet provides calculators and educational tools for general informational purposes only. Results depend strictly on the mathematical assumptions you enter and do not guarantee future financial, stock market, or tax outcomes. This tool does not provide financial, investment, legal, or professional tax advice.
How It Works
Divides 72 by your annual interest rate to provide a reliable estimate of investment doubling time.
Formula & Logic
Years to Double ≈ 72 / Rate of Return (%)Frequently Asked Questions
Common questions about calculations, assumptions, and edge cases.
Yes, Rule of 72 Calculator is 100% free with unlimited calculations and zero paywalls or subscriptions.