Calculating ROMI involves a straightforward formula: ROMI = (Revenue Attributed to Marketing - Marketing Cost) / Marketing Cost For instance, if a company spends $10,000 on a marketing campaign and generates $50,000 in revenue from it, the ROMI would be: ROMI = ($50,000 - $10,000) / $10,000 = 4 This result indicates that for every dollar spent on marketing, the company earned $4 in revenue.