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\nRule of 70 Calculator
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Estimate how long it takes for an investment to double.
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Enter the annual growth rate as a percentage.
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Results
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Doubling Time (years)
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Calculation: 70 / Growth Rate
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About the Rule of 70
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\n The Rule of 70 is a simple way to estimate the number of years it takes\n for an investment or population to double given a constant annual growth\n rate. It’s a useful shortcut in finance, economics, and biology.\n
\n
\n\n \n \n\n\n
Rule of 70 Calculator
\n
Estimate how long it takes for an investment or population to double.
\n\n
Enter the annual growth rate as a percentage.
\n
\n\n \n\n
Results
\n
Doubling Time (years)
\n
\n
Calculation: 70 / Growth Rate
\n
\n
\n
\n\n
About the Rule of 70
\n
\n The Rule of 70 is a simple way to estimate the number of years it takes\n for an investment or population to double given a constant annual growth\n rate. It's a useful shortcut in finance, economics, and biology.\n
\n
\n\n \n