ROI Calculator
Calculate your return on investment (ROI) as a percentage. Enter initial investment and final value to see net profit and ROI.
About the ROI Calculator
Return on investment (ROI) measures how much you gained or lost relative to what you put in. The formula is (final value minus initial cost) divided by initial cost, times 100. An investment of 2,000 that returns 2,500 has an ROI of 25 percent.
ROI is simple, which is both its strength and its weakness. It ignores time: a 25 percent return over one year is very different from 25 percent over ten. For comparing investments of different lengths, annualised return is a fairer measure. It also ignores risk, so a high ROI from a risky venture is not automatically better than a modest one from a safe one.
Include all costs when you calculate it, such as fees, taxes, running costs and the time you spent. Leaving costs out makes almost any project look better than it was.
A marketing campaign costs 5,000 and generates 8,000 in extra profit before the campaign cost. Net gain is 3,000, so ROI is 3,000 divided by 5,000, which is 60 percent.
Tips for best results
- Compare ROI across projects over the same time period.
- Use the same definition of profit each time so results are comparable.
How to use the ROI Calculator
Why use Toolseza for ROI Calculator?
Use this tool as often as you need with no paywalls, premium tiers, or hidden daily calculation quotas.
All calculations and file manipulations run inside your web browser. Your inputs are never sent to a cloud server.
Results update in real-time as you type or adjust settings, with instant one-click copy and export capabilities.
Works natively on smartphones, tablets, laptops, and desktop computers with zero installation or account creation.
Editorial Standards & Verification: All formulas, algorithms, and conversion factors implemented on Toolseza adhere to openly documented international standards (ISO, NIST, BIPM, W3C). Results are verified against benchmark reference datasets before publication.
Frequently Asked Questions
Is ROI Calculator free to use?
Yes — ROI Calculator is completely free, unlimited, and requires no sign-up.
What is a good ROI?
A positive ROI means the investment made money. What counts as "good" depends on the industry, risk, and time horizon — stock markets historically return around 7–10% per year.
Are the calculations accurate?
Yes — it uses the standard, widely accepted formula, so results are accurate and reliable.
Does it work on mobile and tablet?
Yes — ROI Calculator works on any modern browser, including mobile and tablet, no app required.