Marketing ROI Calculator

Marketing Return on Investment (ROI) measures the profitability of marketing campaigns relative to their cost. A positive ROI means the campaign generated more revenue than it cost

The calculator uses the standard published formula for roi marketing. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches, British pounds. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: ROI = (Revenue − Marketing cost) / Marketing cost × 100. Each step in the calculation is shown so you can verify the result manually.