SEO ROI Calculator

Model the return on an SEO investment: project traffic growth, turn it into conversions and revenue, and see net gain, ROI, and payback month. Updates as you type. Runs in your browser.

Live v1.0 · Updated April 2026 Free · No login
Calculator Idle
Updates as you type · runs locally

How it works

Enter six inputs, current and projected monthly organic visitors, conversion rate, value per conversion, monthly SEO investment, and a time horizon. The calculator ramps traffic linearly from current to projected across the horizon and, each month, converts the incremental visitors (the lift over your starting baseline) into revenue.

It then compares cumulative incremental revenue against cumulative cost to find your payback month, total net gain, and ROI, and shows the monthly revenue ramp as a chart with the break-even month highlighted.

Everything recalculates as you type, entirely in your browser.

Frequently asked

Because ROI should credit SEO only with the lift it creates. The calculator treats your current traffic as the baseline you would have anyway, and counts revenue from the additional visitors above it. That keeps the return honest.
As a straight line from current to projected over the horizon. Real SEO growth is lumpier and often compounds later, so treat the monthly ramp as a planning approximation and the totals as directional, not a forecast.
For lead-gen, use average deal value times close rate, so a signup worth pursuing is valued at what it actually returns. For ecommerce, use average order value, optionally times repeat-purchase factor. Garbage in, garbage out applies.
No, it uses a single monthly investment figure. Roll your retainer, content, and tooling into that number for a true all-in cost, or model a single line item if you only want to test one lever.