How this calculator works
Enter proceeds consistently: use sale proceeds or project revenue, not both if that would double-count the same money. The calculation is not annualized and does not discount cash flows. A negative ROI is retained rather than hidden.
The formula
ROI = (proceeds − initial cost − additional costs) / (initial cost + additional costs) × 100.A quick example
An initial cost of 10,000 and additional costs of 1,000 against proceeds of 14,000 produce a 3,000 gain and 27.27% ROI.
How to use this calculator
- Choose the settings that match your scenario, using the units shown beside each field.
- Enter initial investment cost, additional investment costs, revenue or final proceeds.
- Calculate, then review the method and assumptions alongside the results.
A few common questions
Is ROI the same as gross margin?
No. ROI divides gain by investment cost; gross margin divides gross profit by revenue.
Does the result account for the investment period?
No. Use Investment Return & CAGR when comparing beginning and ending values over time.