ROI Calculator (Return on Investment)
Calculator
How to Interpret Your ROI
- Positive ROI: Your investment is profitable.
- Negative ROI: You are losing money on this investment.
- Annualized ROI: Useful for comparing investments held for different lengths of time.
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Return on Investment (ROI) is one of the most important metrics in business, marketing, and investing. It measures how efficiently your money is being used to generate profit, helping you compare opportunities and make smarter financial decisions.
This calculator shows your profit, ROI percentage, and return multiple, giving you a complete view of performance. Whether you're running ads, launching products, or evaluating investments, understanding ROI allows you to scale what works and eliminate what doesn’t.
High revenue alone does not guarantee success. ROI reveals whether your growth is actually profitable and sustainable, making it essential for ecommerce, paid advertising, and business scaling.
Result Explanation
Profit shows the absolute money gained after costs, while ROI shows how efficiently that profit was generated relative to your investment.
Return multiple gives a quick scaling view — for example, a 2× return means you doubled your money. Together, these metrics provide a complete picture of performance.
How this tool works
The calculator subtracts your investment from your return to find profit, then divides profit by investment and multiplies by 100 to calculate ROI. It also shows the return multiple by dividing return by investment.
Strategy & Insight
ROI is essential for scaling decisions. A high ROI indicates efficiency, but it must be balanced with volume. A campaign generating £10 profit at 200% ROI is less impactful than one generating £10,000 profit at 40% ROI.
In advertising, ROI must be considered alongside CPA, ROAS, and margin. A strong ROI combined with scalable acquisition costs is what drives sustainable growth.
⚠️ Common Mistakes
- Confusing ROI with revenue or ROAS
- Ignoring hidden costs (fees, refunds, shipping)
- Focusing only on ROI without considering scale
- Using inconsistent time periods when comparing ROI
💡 Pro Tip
Use ROI alongside volume metrics. The most profitable businesses optimise for total profit, not just the highest percentage return.
Examples
Example 1:
Spend £500 → Return £850 → Profit £350 → ROI 70%
Example 2:
Spend £120 → Return £300 → Profit £180 → ROI 150%
Example 3:
A lower ROI campaign at scale may generate significantly more total profit.
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Frequently Asked Questions
What is ROI?
ROI measures profit relative to investment.
Can ROI be negative?
Yes, if your return is lower than your cost.
Is ROI the same as ROAS?
No. ROAS measures revenue, ROI measures profit.
Running a business? Use our Pricing & Profit Hub to find more tools for margins, markups, and tax estimation.