ROI Calculator
Calculate return on investment — gain, loss, and percentage return visualized
About this calculator
The ROI Calculator measures your return on any investment as a simple percentage. Whether you're evaluating stocks, real estate, a business venture, or a savings account, ROI gives you a common yardstick to compare investments of any size. Enter your initial cost and final value to instantly see your gain, loss, and return percentage.
How to use the ROI Calculator calculator
- Enter your amounts, rates and terms into the input fields.
- Read the result — it updates instantly as you type.
- Adjust the inputs to compare scenarios side by side.
- Copy the page URL to share the exact calculation.
Common examples
- Invested $1,000, now worth $1,200 → ROI 20%, profit $200
- Bought stock at $5,000, sold for $6,800 → ROI 36%, profit $1,800
- Real estate: paid $200,000, sold for $275,000 → ROI 37.5%, profit $75,000
- Business investment $50,000, return $45,000 → ROI −10%, loss $5,000
- Startup investment $10,000, exit value $85,000 → ROI 750%, profit $75,000
Frequently asked questions
How does the ROI Calculator calculator work?
Enter your amounts, rates and terms, and the calculator applies the standard financial formulas to show the outcome, including intermediate figures where they help you understand the result. All arithmetic runs at high precision, so rounding errors do not build up across periods.
When would I use the ROI Calculator calculator?
Use it when planning a purchase, loan, investment or budget, to compare options before committing, or to sanity-check figures quoted to you. It is an educational tool, not financial advice — confirm important decisions with your provider or a professional.
How accurate are the results?
The formulas are the standard ones used in finance and run at 30 significant digits internally. Real products may differ in fees, compounding conventions and rounding rules, so treat the result as a close estimate rather than a contractual figure.
Can I share a specific calculation with someone else?
Yes. Every value you enter updates the URL, so copying the address bar and sharing the link reopens the exact same calculation for whoever clicks it.