What Is ROI?
ROI is the universal scorecard for investments. It lets you compare completely different opportunities on equal footing.
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ROI (Return on Investment) measures the percentage gain or loss on an investment relative to its cost. It is the simplest way to evaluate whether an investment was worth it.
Real-world example: Invest $10,000 and sell for $13,000 — your ROI is 30% (the $3,000 profit divided by your $10,000 cost).
Explore more terms in our comprehensive Financial Glossary with 140+ terms explained in plain English.
Frequently Asked Questions
Why is understanding ROI important for investors?
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Knowing what ROI means helps you make better financial decisions, read investment news with confidence, and avoid common mistakes. Financial literacy is the foundation of successful investing — understanding concepts like ROI puts you ahead of most individual investors.
How does ROI relate to everyday personal finance?
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ROI isn't just Wall Street jargon — it directly impacts how your money grows (or doesn't). Whether you're managing a 401(k), evaluating a savings account, or considering an investment, understanding ROI helps you make choices that align with your financial goals.
Where can I learn more about investing concepts?
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Our Financial Glossary covers 140+ terms across investing, retirement, taxes, credit, crypto, and budgeting — all explained in plain English with real-world examples. You can also use our calculators to see these concepts in action with your own numbers.