How this ROI Calculator works
ROI is a general measure of return relative to the amount invested.
Formula
((Gain − Cost) ÷ Cost) × 100
Worked example
A 1,200 gain on a 1,000 cost produces a 200 net return and a 20% ROI.
How to interpret the result
ROI expresses net return relative to investment cost.
Common mistakes and limits
Define gain and included costs consistently and do not use ROAS and ROI interchangeably.
Frequently asked questions
Can ROI be negative?
Yes. ROI is negative when the return is less than the cost.
Important note
WorkTools provides general-purpose informational calculations. Verify inputs, definitions, policies and jurisdiction-specific requirements before using a result for financial, payroll, legal or other consequential decisions.