How to Use the ROI Calculator
Enter the figures for one investment, then select Calculate. The calculator uses Investment cost ($), Fees ($, optional), Proceeds ($, optional), and Income ($, optional) to show net profit and ROI.
- Enter Investment cost ($).
- Optionally enter Fees ($, optional), Proceeds ($, optional), and Income ($, optional). Blank optional fields count as zero.
- Select Calculate to display the result.
- Select Reset to clear all four inputs.
- Use Copy result or Download result (.txt) to save the plain-text output. If copying fails, the tool shows Could not copy - select and copy manually.
What the Result Includes
The result shows calculated ROI and net profit, plus the entered inputs, total cost basis, and the intermediate values used in the calculation. Amounts are dollar-denominated and formatted as USD. The calculator does not convert currencies.
How ROI Is Calculated
The calculator combines the values in this order:
Total Cost Basis = Investment Cost + FeesNet Profit = Proceeds + Income ̢蠉€â„¢ Total Cost BasisROI (%) = Net Profit / Total Cost Basis Ãâ€â€ 100
Validation and Edge Cases
Investment cost is required. All entered values must be 0 or greater; negative values stop the calculation and show an error. Blank Fees ($, optional), Proceeds ($, optional), and Income ($, optional) fields default to zero. If the total cost basis is zero, ROI is shown as undefined because division by zero is not valid.
Limitations and Privacy
- The calculator does not use dates or annualize returns.
- It does not fetch live rates, prices, market data, or account records.
- It does not provide personalized financial or investment advice.
- The calculation runs locally from the values you enter.
Frequently Asked Questions
What is the ROI formula this calculator uses?
ROI (%) = Net Profit / Total Cost Basis Ãâ€â€ 100, where Total Cost Basis = Investment Cost + Fees and Net Profit = Proceeds + Income ̢蠉€â„¢ Total Cost Basis. This is the standard single-period return-on-investment formula, expressed as a percentage of the money you put in.
What counts as proceeds versus income?
Proceeds are the amount received when the investment is sold or closed out - for example, a sale price or exit value. Income is any cash received while holding the investment, such as dividends, interest, or rent. Both are added together and treated as money returned to you before ROI is calculated.
How are fees treated in the ROI calculation?
Fees are added to the investment cost to form the total cost basis, so they reduce ROI the same way the initial cost does. Enter any purchase fees, transaction costs, commissions, or ongoing charges that were not already included in the investment cost figure, to avoid double-counting.
Does this calculator account for time or annualize the return?
No. This is a single-period ROI calculation with no dates or compounding - it does not annualize the result or account for how long the money was invested.
Does this tool fetch live rates or provide personalized advice?
No. It only uses the investment cost, proceeds, income, and fees you type in. It does not fetch live rates, prices, market data, or account records, and it is not personalized financial or investment advice.