ROI Calculator
Calculate return on investment (ROI), net gain or loss, total investment cost and value multiple from an initial investment, additional costs and final value.
Enter your values
Change any assumption and calculate again to compare scenarios.
How This ROI Calculator Works
The calculator uses the transparent method shown on this page: ROI = (final value − total investment cost) ÷ total investment cost × 100. The calculation is performed locally in your browser. Inputs are not sent to a remote calculation service simply to produce the answer.
Before relying on any result, confirm that the inputs use the same units, time period and definition. A calculator can make arithmetic repeatable, but it cannot verify whether the source values were entered correctly. For important financial decisions, compare the result with lender, bank, investment-provider or professional documentation that applies to your situation.
A useful check is to change one input by a small amount and confirm that the answer moves in the direction you expect. This sensitivity check can reveal typing errors and also shows which assumptions have the greatest effect on the result.
How to Use It
- Enter the requested values carefully.
- Select Calculate.
- Review the main result and supporting details together.
- On smaller screens, the result opens immediately as a compact bottom panel, so you do not need to scroll down to find it.
- Use Copy, Share or Save Result Image when you want to keep the answer.
Worked Example
If an investment starts at 10,000, incurs 500 of additional costs and is later worth 13,000, the total cost basis in this simple model is 10,500. The calculator compares the 2,500 gain with that total cost to calculate ROI.
Common Uses
- Measure a simple gain or loss relative to cost.
- Include additional acquisition or project costs in the denominator.
- Compare straightforward investment outcomes.
- Cross-check ROI before moving to time-sensitive measures such as CAGR or IRR.
How to Interpret the Result
ROI is a simple percentage that makes scenarios easier to compare, but it does not automatically account for time. A 20% ROI earned in one year and the same ROI earned over five years are economically different; use CAGR or IRR when timing matters.
Important: This tool is for general planning and checking. It is not financial, investment, tax or lending advice and does not replace provider disclosures or professional guidance.
Common Search Questions About ROI Calculator
How do I calculate roi?
Use the calculator on this page and enter the requested values. Calculate return on investment (ROI), net gain or loss, total investment cost and value multiple from an initial investment, additional costs and final value.
How can I get the roi 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 roi?
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.
Important Limitations
This simple ROI model does not automatically include taxes, financing costs, dividends or cash flows occurring at different dates. Define final value and costs consistently before comparing projects or investments.
For financial tools, currency selection changes formatting only and does not perform exchange-rate conversion. Keep source documents when the result is used for a decision, comparison or record.
Privacy and Result Downloads
The calculation is performed in your browser. Entered values are used by the page to calculate and display the result. Saving a result image creates the graphic locally in the browser using the displayed result.
The result card is designed to preserve enough context to understand what the displayed number represents while avoiding the need to screenshot the surrounding page, navigation or advertisements.
Frequently Asked Questions
Can ROI be negative?
Yes. If final value is below total investment cost, the calculator reports a negative ROI.
Does ROI include time?
No. Simple ROI does not show how long the return took to earn.
What are additional costs?
They can represent fees or other costs you want included in the investment cost basis for this calculation.