ROI Calculator
ROI Calculator
Return on Investment
What is the ROI Calculator?
ROI Calculator calculate return on investment with gain/loss analysis. It is part of Home of Calculators's Finance Calculators suite for financial planning, loan calculations, investment analysis. The calculator is designed for investors, homebuyers, business owners, but anyone can use it. No signup, no ads, no tracking. Just accurate math, computed locally in your browser using a BigNumber-precision math engine.
Return on Investment (ROI) measures the profitability of an investment as a percentage. It compares the net gain or loss relative to the initial cost. ROI does not account for the time period — for that, use annualized ROI or CAGR.
Initial ValueCost of investment ($)Final ValueCurrent/sale value ($)How to use the ROI Calculator
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Calculate the gain or loss
Subtract the initial value from the final value.
- 2
Divide by initial value
Divide the gain/loss by the initial investment cost.
- 3
Convert to percentage
Multiply by 100 to express ROI as a percentage.
Quick tips
- All calculations run locally in your browser; your data never leaves your device.
- For best results on mobile, rotate to landscape when entering many values.
- Bookmark this page to come back to your calculation anytime.
- Need a different calculator? Try our visual builder to create your own.
Why Home of Calculators
- 100% private (calculations run in your browser)
- 128-bit BigNumber precision (no rounding errors)
- Works on any device: phone, tablet, desktop
- Free forever (no signup, no ads, no upsells)
Frequently asked questions
Is the ROI accurate?
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Yes. Home of Calculators uses a BigNumber-precision math engine (64-128 decimal digits) to ensure calculations are accurate. We run 96+ automated tests covering unit conversion, financial formulas, health formulas, and more. For critical decisions (financial, medical, legal), we still recommend consulting a qualified professional.
Is the ROI Calculator free?
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Yes. Every calculator on Home of Calculators is 100% free, with no signup, no ads, and no hidden fees. The entire platform is free forever.
Do you store the values I enter?
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No. All calculations happen in your browser. We never see, store, or transmit your inputs to any server. Your data stays on your device.
Can I use the ROI on my phone?
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Yes. Home of Calculators is fully responsive and works on any device (phone, tablet, laptop, or desktop). The interface adapts to your screen size.
Can I embed this calculator on my own website?
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Yes. Click the "Share" button to get an iframe embed code. The embedded calculator will look like any other Home of Calculators widget. You can also build a fully customized version using our visual builder.
Can I build my own custom calculator?
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Absolutely. Home of Calculators's visual builder lets you add fields, write formulas, choose a theme, and brand the result with your own logo, all without writing code.