About the Annualized Return Calculator
Use this tool to convert a return earned over one period, such as a month or quarter, into an equivalent compounded annual return. It is useful for investors, analysts, and students who want to compare returns measured over different time intervals.
How to use this calculator
- Enter the period return as a percentage.
- Enter the number of periods in one year, such as 12 for monthly or 4 for quarterly.
- Review the annualized return shown in the results area.
- Check the growth factor per period and annual growth factor for more detail.
- Adjust either input to instantly recalculate the result.
How it works
The calculator uses the period return and the number of periods per year. The period return is first converted into a growth factor by dividing by 100 and adding 1.
It then compounds that growth factor by the periods-per-year value. The formula is ((1 + r/100)^n − 1) × 100, where r is the period return percentage and n is the number of periods per year.
The result assumes the same return repeats and compounds for every period in the year. This is an educational compounding estimate and does not account for taxes, fees, cash flows, volatility, or investment risk, so it is not financial advice.
Example calculation
If an investment earns 15% in one quarter, enter 15 for the period return and 4 for periods per year. The period growth factor is 1.1500, the annual growth factor is 1.15^4 = 1.7490, and the annualized return is (1.7490 − 1) × 100 = 74.90%.
Frequently asked questions
What does annualized return mean?
Annualized return expresses a shorter-period return as the compounded return that would occur over one year if the same period return repeated.
What should I enter for periods per year?
Use the number of equal periods in a year: 12 for monthly returns, 4 for quarterly returns, 52 for weekly returns, or 365 for daily returns.
Can the period return be negative?
Yes, as long as it is -100% or higher. A return below -100% is not valid for this compounding formula because it would create a negative growth factor.
Why is annualized return different from multiplying by the number of periods?
This calculator compounds returns, so each period’s return is applied to the new balance. Simple multiplication ignores compounding.
Does this predict my actual yearly investment return?
No. It only annualizes the entered period return under a constant compounding assumption and does not include market changes, fees, taxes, or risk.