Financial Tool
Rule of 72 Calculator
Estimate how long it takes to double your investment.
Rule of 72 Est.
10.29
Years
Exact Calc
10.24
Years
Rule of 69.3
9.90
Years
Σ The Formula
Years ≈ 72 / Interest Rate
Real World Examples
7% Return
72 / 7 ≈ 10.3 years
# About This Calculator
The Rule of 72 is a simple way to estimate the number of years required to double an investment at a given annual fixed interest rate.
Rule of 69.3 is often used for continuous compounding and is more accurate for lower interest rates.
Frequently Asked Questions
Is Rule of 72 Calculator free to use?+
Yes, Rule of 72 Calculator on Matheric is completely free to use. We believe in accessible education and utility for everyone.
How accurate is Rule of 72 Calculator?+
We use standard mathematical formulas and high-precision computing algorithms to ensure results for Rule of 72 Calculator are accurate for academic and professional use.
Can I use Rule of 72 Calculator on my phone?+
Yes! Rule of 72 Calculator is fully responsive and optimized for all devices, including smartphones, tablets, and desktops.
Do you save my data?+
No. We prioritize your privacy. All calculations are performed in your browser or temporarily processed, and we do not store your personal input data.
How do I report a bug?+
If you notice any issues with Rule of 72 Calculator or have suggestions for improvement, please contact us via the link in the footer. We value your feedback!
Can I request a new feature?+
Absolutely. We are constantly expanding our toolset. Feel free to reach out with your requests, and we might build it next!
About
The Rule of 72 is a simple way to estimate the number of years required to double an investment at a given annual fixed interest rate.
Rule of 69.3 is often used for continuous compounding and is more accurate for lower interest rates.