SEO Return on Investment Calculator

1. Choose a reporting period

Use the same month, quarter, or year for traffic, conversions, value, and cost.

2. Enter organic sessions

Exclude paid search and other channels.

3. Set organic conversion rate

Use conversions divided by organic sessions under your analytics definition.

4. Assign conversion value

Enter average revenue, gross profit, or qualified lead value consistently.

5. Enter SEO cost

Include the SEO investment attributable to the selected period.

6. Review profit and ROI

Use the output with your attribution assumptions and historical baselines.

Conversions = Organic sessions × Conversion rate
Attributed value = Conversions × Value per conversion
SEO profit = Attributed value − SEO cost
SEO ROI = SEO profit ÷ SEO cost × 100

ROI compares net value with cost. If conversion value is revenue rather than gross profit, the result is a revenue-based ROI and may overstate economic return where fulfillment or product costs are material.

What the result means

The main result expresses estimated net SEO value as a percentage of the SEO cost.

SEO effects can persist beyond the selected period, while attribution and lag assumptions can materially change the result.

Given

• 180,000 organic sessions
• 2.4% conversion rate
• $110 value per conversion
• $85,000 SEO cost

Calculation

Conversions = 180,000 × 0.024 = 4,320. Attributed value = 4,320 × $110 = $475,200. Profit = $475,200 − $85,000 = $390,200. ROI = $390,200 ÷ $85,000 × 100 = 459.06%.

Result

Estimated SEO ROI = 459.06%.

Interpretation

The modeled organic value exceeds the period’s SEO cost by $390,200, subject to the chosen attribution and value definitions.