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Average Return Calculator

Use this average return calculator to model growth, return, or time-value scenarios for average return.

Primary answer
Arithmetic average return
Inputs to verify
Period returns
Use type
Use as an estimate that depends on assumptions.
Keyword intent
average return calculator

Calculator

Average Return Calculator

Calculates arithmetic average return from period returns. Defaults are filled in so you can review a working example before changing inputs.

%

Enter equal-period returns separated by commas, spaces, or new lines. Use 10 for 10%, not 0.10.

Result

Result reflects the current submitted inputs.

  • Risk B
  • Reviewed 2026-05-26
  • 2 sources
Arithmetic average return5.666667%
Geometric average return5.384831%
Cumulative return17.04%
Periods3
Best period return12%
Worst period return-5%

Breakdown

Periods
3
Cumulative growth factor
1.1704
  • Input 10 means 10%, not 0.10.
  • All returns are assumed to represent equal-length periods.
  • Returns are historical or user-provided; no current market data or forecast is used.
  • Fees, taxes, inflation, cash flows, risk, volatility, and investment suitability are excluded.
  • This is an educational estimate, not investment advice.

Accuracy notes

Risk level
B
Reviewed
2026-05-26
Sources
2
Primary result
Arithmetic average return

Formula logic is kept in a pure calculator module with fixtures, source notes, and page-visible assumptions.

Categories

What the result means

Arithmetic average return answers the page's main average return question. Simple average of the period returns. Read the projected value or rate first, then use contribution, period, and return outputs to explain why it changed. Use geometric average return, cumulative return, and periods to explain why arithmetic average return moved when an input changed. Change one assumption at a time so you can see which input is driving the projection.

Arithmetic average returnSimple average of the period returns.
Geometric average returnCompounded average return per period.
Cumulative returnTotal compounded return across all periods.
PeriodsNumber of returns included in the calculation.

Use the result this way

  1. Start with Arithmetic average return, then use supporting outputs only to explain the primary answer.
  2. Verify period returns before copying the result.
  3. Keep units consistent with the labels shown in the form and enter percentages as whole percents, such as 6.5 for 6.5%, unless a field says otherwise.
  4. Change one assumption at a time so you can see which input is driving the projection.

User job

How to use this calculator

Use Average Return Calculator when you need arithmetic average return, then use geometric average return and cumulative return to check the context for planning conversations, quote comparisons, payment checks, and scenario review.

Best for

  • Comparing one financial scenario with another
  • Preparing questions for a lender, advisor, or statement review
  • Reviewing a default example before entering your own period returns.

Check before relying

  • Verify rates, fees, timing, taxes, and local rules against official documents before acting.
  • Input 10 means 10%, not 0.10.
  • All returns are assumed to represent equal-length periods.
  • Source context: OpenStax, reviewed 2026-05-26.

Next useful step

  • Mutual Fund CalculatorUse next when the investment task needs ending value after costs instead of arithmetic average return.
  • Annuity CalculatorUse next when the investment task needs future value instead of arithmetic average return.
  • Annuity Payout CalculatorUse next when the investment task needs payout per period instead of arithmetic average return.

Formula

Arithmetic average return is the simple mean of period returns. Geometric average return is (product(1 + returnDecimal) ^ (1 / periods) - 1) x 100. Key assumptions: Input 10 means 10%, not 0.10. All returns are assumed to represent equal-length periods. Returns are historical or user-provided; no current market data or forecast is used.

  • Arithmetic average return is the simple mean of period returns. Geometric average return is (product(1 + returnDecimal) ^ (1 / periods) - 1) x 100.
  • Input 10 means 10%, not 0.10.
  • All returns are assumed to represent equal-length periods.
  • Primary source context: OpenStax.

Inputs

Enter period returns for planning conversations, scenario checks, and lender or statement comparison. Before calculating, keep units consistent with the labels shown in the form and enter percentages as whole percents, such as 6.5 for 6.5%, unless a field says otherwise. Period returns: Enter equal-period returns separated by commas, spaces, or new lines. Use 10 for 10%, not 0.10.

Period returnsEnter equal-period returns separated by commas, spaces, or new lines. Use 10 for 10%, not 0.10.

Example

Using the default inputs, Average Return Calculator returns arithmetic average return of 5.666667%. Adjust period returns to match your own scenario.

FAQ

How is arithmetic average return calculated here?

Arithmetic average return is the simple mean of period returns. Geometric average return is (product(1 + returnDecimal) ^ (1 / periods) - 1) x 100. The first assumption to check is: Input 10 means 10%, not 0.10.

What does Arithmetic average return mean for average return?

Read the projected value or rate first, then use contribution, period, and return outputs to explain why it changed. Secondary values such as geometric average return, cumulative return, and periods are there to explain the primary answer, not to replace it.

What should I enter for Period returns?

Enter equal-period returns separated by commas, spaces, or new lines. Use 10 for 10%, not 0.10. Use % for this field. Keep units consistent with the labels shown in the form and enter percentages as whole percents, such as 6.5 for 6.5%, unless a field says otherwise.

What can make the average return answer change?

The answer can change when inputs, units, rounding, or source assumptions change. Compare nominal versus effective rate, contribution timing, compounding frequency, inflation, fees, and tax treatment.

Why does the average return example show 5.666667% for arithmetic average return?

The default inputs produce 5.666667% for arithmetic average return. Treat that as a format and scale check, then replace every default value with your own inputs.

Can the average return result replace financial advice?

No. Use the average return result as comparison context only. Market returns, taxes, fees, legal terms, and personal constraints can change the real outcome.

Sources

Last reviewed: 2026-05-26

  • Reviewed 2026-05-26
    Principles of Finance: 15.1 Risk and Return to an Individual AssetOpenStax. Arithmetic average return, geometric average return, equal-period return interpretation, and published fixture comparison.
    Scope
    Open educational finance reference for arithmetic and geometric average returns.
    Supports
    Arithmetic average return, geometric average return, equal-period return interpretation, and published fixture comparison.
  • Reviewed 2026-05-26
    Introductory Business Statistics: 2.5 Geometric MeanOpenStax. Geometric mean concept for growth and return calculations.
    Scope
    Open educational statistics reference for geometric mean and growth-rate applications.
    Supports
    Geometric mean concept for growth and return calculations.

Disclaimer

This finance calculator is for educational projection work only. It is not investment, tax, legal, retirement, insurance, or fiduciary advice, and it does not account for every fee, risk, market change, or personal circumstance.