Investment doubling time
Finance / FREE CALCULATOR
Estimate years needed to double a balance at a fixed positive annual return.
Your answer starts here.
Enter your values and select Calculate to see the result and any available breakdown.
How to use this calculator
- Enter annual effective return (%). Use the unit shown beside the field.
- Select Calculate and review the result. Select Reset to restore the example inputs.
How the calculation works
log(2)/log(1+Annual effective return (%)/100)
Worked example
Annual effective return (%) = 10. Result: 7.27254 years.
Understand your result
Estimate years needed to double a balance at a fixed positive annual return. The result is expressed in years.
Assumptions and limitations
A mathematical scenario, not a forecast or investment recommendation. Results are rounded for display.
Questions about this tool
What does this tool calculate?
Estimate years needed to double a balance at a fixed positive annual return.
What should I check before using the answer?
A mathematical scenario, not a forecast or investment recommendation.
Related guides
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