QUICKTOOLS GUIDE

ROI, Margin, and Markup Explained

Keep three commonly confused business calculations separate: return on investment, profit margin, and markup.

Updated September 2026 · Written to explain the task before you use the calculator or converter.

The key ideas

How the calculation or process works

Margin = profit ÷ revenue × 100

Markup = profit ÷ cost × 100

Simple ROI = (final value − initial investment) ÷ initial investment × 100

Common mistakes

Use the related QuickTools utility

Once you understand the method, the QuickTools ROI, Margin, and Markup Explained page can handle the repetitive part of the task.

Important: A general guide explains a method; it does not know the rules, assumptions, or requirements of a particular business, contract, institution, or software system. Check those requirements when they matter.