Business calculator
ROI Calculator
Calculate return on investment and net profit.
Last reviewed
September 2026
September 2026
Enter your details
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How we calculate
A transparent estimate you can inspect.
Formula
Net profit divided by total cost, expressed as a percentage.
Privacy
Your values are calculated locally and are not sent to a server by this calculator.
Use with care
Results are for informational purposes, not financial, tax, legal, lending, or investment advice.
Understanding your results
ROI divides net profit by total cost; a loss can produce a negative ROI.
Assumptions and limitations
- A zero total cost has no defined ROI.
Common questions
Before you decide
What are these results for?
Use them as planning estimates and reconcile them with your actual accounting data.
Can results be negative?
Yes. A negative profit or margin is a meaningful outcome.