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↗ ROI Calculator

Calculate return on investment from cost and final value.

Enter values and calculate.

Formula or method

ROI = (Final Value − Initial Cost) ÷ Initial Cost × 100

Results are estimates based on the values entered. Review assumptions before making consequential decisions.

Read the complete guide →

Calculator explained

About the ROI Calculator

Calculate return on investment from cost and final value. This page combines the interactive tool with practical guidance so you can understand both the result and the assumptions behind it.

How the result is calculated

Return on investment compares net gain with the original cost and expresses the result as a percentage.

Practical example

An investment costing $1,000 and returning $1,150 has a $150 net gain, equivalent to a 15% ROI before taxes and other costs.

Common mistakes to avoid

Common errors include mixing annual and monthly rates, omitting fees, entering percentages as whole numbers when decimals are expected, and assuming projections are guaranteed.

How to use the result

Results depend on the values and assumptions entered. Interest rates, taxes, fees, compounding rules, and payment timing can materially change real-world outcomes.

Frequently asked questions

Does this tool store my values?

Values may be saved only in local browser storage for convenience. They are not sent to an IKDHub account.

Should I independently verify the result?

Yes. Verify consequential results with authoritative sources or a qualified professional.

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Last reviewed 2026-07-26. Educational use only; verify important decisions with a qualified professional or authoritative source.