Tax, Salary & Business
ROI Calculator
ROI — it computes return on investment = (gain − cost) ÷ cost × 100. This page runs that same calculation on your numbers, in your browser: no signup, no uploads, nothing stored.
Enter your amount invested and final value and ROI Calculator works out the ROI percentage with (gain − cost) ÷ cost — fast, free and private, with no sign-up or uploads.
Estimate only — not financial or accounting advice. Results depend on the figures you enter and exclude taxes, fees and one-off costs unless a field asks for them.
About this calculator
It computes return on investment = (gain − cost) ÷ cost × 100. That is the whole of the calculation — the mistakes happen in the inputs. It matters whenever pay, prices or filings depend on getting the arithmetic right before the paperwork does. Worked example: Investing 50,000 and receiving 65,000: ROI = (65,000 − 50,000) ÷ 50,000 × 100 = 30% . Use the calculator with your own figures; it runs entirely on your device.
How to use
- Enter the amount you invested.
- Enter the final value you received or expect.
- Keep the invested and final amounts as plain numbers.
- Tap Calculate to see the ROI percent and the gain.
Why use the ROI Calculator
Instant
Every figure is computed on your device the moment you tap Calculate.
Private
Your numbers stay in your browser; nothing is sent to a server or saved.
Free
No signup, no paywall, and no ads placed inside your results.
Works offline
Once the page has loaded it keeps working even on a weak connection.
Mobile-first
Laid out for phones and tablets just as much as for desktops.
Honest estimates
Uses simplified, standard formulas for educational estimates; real-world figures vary with local rules, fees, and current rates.
Common uses
Use it when measuring return on investment
Use it when reviewing a purchase's value
Use it when sizing a gain against cost
Use it when justifying a spend
Use it for capital-allocation decisions
Use it for percentage-return checks
Technical notes
ROI Calculator computes return on investment = (gain − cost) ÷ cost × 100.
Figures use the costs, prices and rates you enter and exclude taxes and one-off charges unless a field asks for them.
Because it runs locally, results appear instantly with no server round-trip.
Worked example
Investing 50,000 and receiving 65,000: ROI = (65,000 − 50,000) ÷ 50,000 × 100 = 30%.
FAQ
How does this ROI calculator compute return?
ROI is the gain (final value minus amount invested) divided by the amount invested, shown as a percentage, so 1,000 growing to 1,500 is a 50 percent ROI.
Does the ROI Calculator send my data to a server?
No. The ROI Calculator runs entirely in your browser with JavaScript; the values you enter never leave your device and nothing is uploaded or saved.
Does it account for time?
No. This is a simple total return, not annualised. For a yearly rate, use a CAGR or annualised-return tool over the holding period.
Can ROI be negative?
Yes. If the final value is below the amount invested, the ROI is negative, reflecting a loss.