Rule of 72 Calculator
Rule of 72 Calculator by NIVITA HUF. Model scenarios, review calculations, explore detailed breakdowns and export results. Useful free planning tool.
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Your calculation
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How this calculator works
Doubling time = ln(2) / ln(1 + rate).
Important assumptions
The rule of 72 is an approximation. Exact time assumes annual compounding without withdrawals.
About the Rule of 72 Calculator
What inputs are needed for the Rule of 72 Calculator?
The calculator supports Annual growth rate (%). You can change each applicable input and immediately recalculate.
How does the Rule of 72 Calculator calculate its results?
Doubling time = ln(2) / ln(1 + rate).
Can I save or share my calculation?
Yes. Use Export CSV for the results table, Copy results for a summary, Share scenario for an input-preserving link, or Print to keep a copy. No sign-in is needed.
Are calculator results guaranteed?
No. Calculations depend on the values entered and the assumptions shown. Financial products and regulatory rules can change, and investment projections do not guarantee returns.