ROI Calculator – Return on Investment | MZ Smart Tools House
Calculate profit or loss and ROI percentage from investment cost and final return with safe zero-cost validation.
Measure return relative to the original investment cost.
How it works
ROI = (Return − Cost) ÷ Cost × 100.
Example
A cost of 10,000 and return of 12,000 gives 2,000 profit and 20% ROI.
Frequently asked questions
Can ROI be negative?
Yes. If the final return is below cost, the calculator reports a negative ROI.
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