Step-by-step instructions
- Enter or select Annual return rate (%).
- Tap Calculate.
- Review the result shown directly below the calculator.
Rule of 72 Calculator
Estimate doubling time from an annual return rate.
How to use the Rule of 72 Calculator
Estimate doubling time from an annual return rate.
What the inputs mean
- Annual return rate (%)
- Enter the percentage value requested by the calculator.
Formula or calculation method
The calculator applies the standard mathematical relationship for the labeled inputs and returns the computed result automatically.
Example
Enter a realistic value for Annual return rate (%) and tap Calculate to see the computed result.
How to understand the result
Use the result as an estimate based on the values you entered. For planning decisions, double-check that the input units and assumptions match your real situation.
Tip: Keep all values in compatible units and use values from the same time period when the calculator compares two amounts.