ROI Calculator
Measures return on investment by comparing net gain or loss against the original cost, expressed as both a percentage and a dollar amount. Essential for marketing campaign evaluation, equipment purchase decisions, real estate investment analysis, and comparing investment opportunities. Figures never leave your device — every calculation runs locally in your browser.
How to Use the ROI Calculator
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Frequently Asked Questions
How is ROI calculated?
ROI = (gain − cost) ÷ cost. Example: $12,000 revenue on $10,000 ad spend → ($12,000−$10,000)÷$10,000 = 20%. Simple, but time-blind — see annualization below.
Why annualize ROI?
The tool shows simple ROI only — it has no time input. To annualize manually: 20% in 3 months (≈107% annualized) beats 20% in 2 years (≈9.5% annualized). Annualized ROI = (1+ROI)^(1/years) − 1. Always attach a horizon or comparisons lie.
ROI vs ROAS vs profit?
ROAS = revenue ÷ spend ($12k÷$10k = 1.2×) ignores costs beyond ads; ROI subtracts full cost; profit is the dollars. A 300% ROAS campaign can still lose money after product and overhead costs.
What does ROI miss?
Risk, timing, and intangibles: a 50% ROI bet that can go to zero differs from a 15% certain return. ROI also ignores brand, learning, and customer-lifetime effects — pair it with payback period.
When using ROI Calculator, is my data stored?
No. All calculations run locally in your browser. No figures leave your device.
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Last updated October 2026