Return on Investment Calculator
Compare final proceeds with the initial investment.
Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Final proceeds should include distributions and sale proceeds after any costs you wish to account for.
Example Calculation
- Initial investment: 1000 $
- Final proceeds: 1200 $
An investment of $1,000 returning $1,200 produces a 20% ROI.
Frequently asked questions
How do I use this calculator?
Enter initial investment, final proceeds. The result updates automatically. Use Reset to restore the example values.
What method does it use?
ROI = (proceeds − cost) / cost × 100. Final proceeds should include distributions and sale proceeds after any costs you wish to account for.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.