BusinessReviewed Methodology
ROI Calculator
An ROI calculator helps you estimate net return and return on investment percentage by using total gain and total cost.
Quick answer
Net return equals gain minus cost.
What this tells you
- •Net return equals gain minus cost.
- •ROI percentage compares net return with cost.
- •Use ROI as an estimate and pair it with broader cost analysis.
How to Use
- 1Enter the total gain value for the project or campaign.
- 2Enter the total cost invested.
- 3Calculate to view estimated net return and ROI percentage.
- 4Compare scenarios using consistent time periods and cost assumptions.
How It Works
Formula
Net Return = Gain - Cost
ROI (%) = (Net Return / Cost) x 100The calculator estimates ROI by dividing net return by cost and converting the ratio to a percentage.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
Campaign ROI estimate
Gain$18,000
Cost$12,000
ResultEstimated net return: $6,000 | Estimated ROI: 50%
This estimate means returns were 50% above cost based on entered gain and cost values.
Common mistakes
- Using revenue as gain without subtracting all relevant costs
- Comparing ROI across different time windows without context
- Assuming ROI alone measures risk or cash-flow quality
Limitations
This ROI estimate uses only gain and cost fields. It does not automatically include timing effects, taxes, inflation, financing terms, operational constraints, or risk adjustments unless manually reflected in inputs.
Frequently Asked Questions
A negative ROI estimate means total cost is higher than total gain based on the values entered.
No. ROI is a useful metric, but decisions should also consider risk, timing, cash flow, and strategic goals.
No. Include all relevant costs in your input to avoid overestimating ROI.