Average Investment Return Calculator
Find arithmetic and geometric average returns from a series of periodic investment returns.
Calculate Average Investment Return
Find arithmetic and geometric average returns from a series of periodic investment returns.
What This Average Investment Return Calculator Calculates
This calculator summarizes a series of periodic percentage returns in two ways. The arithmetic average is the simple mean, while the geometric average reflects compounding across the full sequence.
Formula and Method
Arithmetic average = Ī£ returns Ć· n; Geometric average = [Ī (1 + rįµ¢)]^(1/n) ā 1.
The result uses only the values entered on this page. No account or sign-in is required, and the calculator itself runs locally in your browser.
How to Use the Calculator
- Enter the requested amount, rate, term, or cash-flow values using consistent units.
- Check whether a percentage is annual, periodic, nominal, or effective as indicated by the field label.
- Select Calculate and review the main result plus the supporting figures.
- Use Copy, Share, or Save Result Image only after you have reviewed the assumptions.
Worked Example
For annual returns of 8%, ā3%, 12%, 6%, and 10%, the arithmetic average and compounded geometric average will differ because losses and gains compound asymmetrically.
Common Uses
- Summarize historical annual or monthly return observations.
- Compare simple average return with compounded average growth.
- Review performance consistency across several periods.
How to Interpret the Result
The result is an estimate based on a simplified mathematical model. Compare it with the supporting figures rather than relying on one number alone. For borrowing or savings products, actual rates, fees, payment dates, taxes, and institutional rules can change the final amount.
Important Notes and Limitations
Historical averages do not predict future returns. The geometric calculation requires every entered return to be greater than ā100%. For important financial decisions, confirm current product terms and calculations with the relevant bank, lender, employer, accountant, or financial professional.
Frequently Asked Questions
Which average is better for investment growth?
Geometric average is generally more representative of compounded multi-period growth.
Why can the arithmetic average be higher?
The arithmetic mean does not account for volatility drag caused by compounding gains and losses.
Can I enter monthly returns?
Yes. The result is an average per entered period; it is not automatically annualized.
Common Search Questions About Average Investment Return Calculator
How do I calculate average investment return?
Use the calculator on this page and enter the requested values. Find arithmetic and geometric average returns from a series of periodic investment returns.
How can I get the average investment return result quickly?
Enter the required values, calculate, and review the result together with its supporting figures. On rebuilt mobile calculators, the answer is brought into the current viewport so the result is easy to find.
What values do I need to calculate average investment return?
Use the inputs shown in the calculator form and keep units consistent. For important decisions, use measured or verified values and review the page assumptions before relying on the result.