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Marketing ROI Calculator

Enter revenue generated, gross margin, and marketing cost to find marketing ROI.

How it is calculated

The tool measures profit, not revenue, against what was spent. gross profit = revenue × gross margin ÷ 100, then net profit = gross profit − marketing cost, and ROI = net profit ÷ marketing cost × 100. Revenue is what the campaign brought in, gross margin is a percentage between 0 and 100, and marketing cost must be above zero. Amounts are in dollars. A negative ROI means the campaign earned less gross profit than it cost. Only the marketing cost is deducted, so staff time, overhead and returns are not included unless you add them to the marketing cost field yourself.

Worked example

A campaign brings in $50,000 of revenue, your gross margin is 40%, and the campaign cost $12,000. Gross profit: 50,000 × 0.40 = $20,000.00. Net profit: 20,000 − 12,000 = $8,000.00. ROI: 8,000 ÷ 12,000 × 100 = 66.67%. Each dollar spent returned its dollar plus about 67 cents of profit. If the revenue were only $20,000, gross profit would be $8,000 and ROI would be -33.33%.

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Common mistakes

  • Entering revenue but a margin of 100%, which makes the campaign look far better than it is. Use your actual gross margin so the cost of goods is taken out.
  • Typing the margin as 0.40 instead of 40. The field is a percentage from 0 to 100, so 0.40 means 0.4% and the ROI collapses to a large loss.
  • Counting all revenue, including sales that would have happened anyway. Only the incremental revenue the campaign caused belongs in this field.
  • Leaving out creative, agency fees or tool costs from marketing cost. A cost that is too low inflates the ROI.

About this calculator

Marketing ROI measures how much profit a marketing campaign generated relative to what it cost: (revenue generated × gross margin − marketing cost) ÷ marketing cost. Multiplying revenue by gross margin first is the key step, since it converts raw revenue into actual profit contribution before comparing it against spend — crediting marketing with revenue alone would overstate its return by ignoring the cost of goods or services delivered.

Marketing teams and CMOs use ROI to compare channels and campaigns on equal footing, justify budget allocation to finance, and decide where to scale spend versus where to cut it. Campaign revenue is first cut down to gross profit with your margin, then set against the marketing spend, giving ROI as a ratio or a percentage.

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Comments (1)

  • Editorial team

    Here ROI is measured on gross profit, so the break-even revenue is the spend divided by the margin. With a 50% margin and 12,000 of spend, revenue of 24,000 returns exactly 0.00%, while 60,000 returns 150.00%. Revenue also arrives in the period you chose, which understates campaigns whose customers come back later. How do you attribute revenue to a campaign: last click, first touch, or something else?

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