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Estimate what organic traffic could be worth.

Turn your own traffic, conversion and customer-value numbers into a month-by-month estimate of leads, customers, revenue and return on SEO spend. Every formula is shown.

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Organic sessions per month.
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Fill in the inputs and run the tool to see results here.

How it works

What the tool does.

Estimate leads, customers, revenue and return from organic traffic, month by month.

  1. You enter your current organic traffic and the rates that turn a visit into revenue.
  2. The calculator applies optional monthly growth to traffic, then runs the same funnel for every month.
  3. It totals leads, customers, revenue and investment, and shows revenue less SEO spend and revenue-based return for the whole period.
Methodology

The rules behind the result.

Nothing is hidden. These are the exact rules the tool applies.

  • Traffic in month n = starting traffic × (1 + growth)^(n − 1).
  • Leads = traffic × conversion rate.
  • Customers = leads × lead-to-customer rate.
  • Revenue = customers × average customer value.
  • Revenue less SEO spend = estimated revenue − SEO investment.
  • Revenue-based return = (estimated revenue − SEO investment) ÷ SEO investment. Delivery costs are excluded.
  • Fractional leads and customers are kept in the maths and rounded only for display, so totals are not distorted by rounding.
Reading the result

What the result means.

  • Revenue is scenario value from your inputs, not measured profit. To assess contribution, apply a verified margin before subtracting SEO spend. Lifetime value may include revenue collected beyond the modeled period.
  • A negative estimate means the assumed revenue is below SEO spend in that period. The cumulative view tests the supplied scenario; it does not establish normal performance or profit payback.
  • The result is only as good as the inputs. Small changes to conversion or close rate move the outcome a lot, so try a cautious case and an optimistic case.
Example

How someone might use it.

A local service business checking whether SEO spend pays back

This illustrative example uses invented inputs: a plumbing company gets 1,200 organic visits a month. About 4% call or fill in a form, and they win roughly 35% of those leads. An average job is worth $450, and they spend $2,500 a month on SEO.

With no growth, that is 48 leads, about 17 customers and roughly $7,560 in revenue a month, revenue less SEO spend of about $5,060, before delivery costs and overhead. Adding 3% monthly traffic growth shows how the gap widens over a year. The owner can then compare this against what the same budget would buy in paid ads.

Limitations

What it cannot tell you.

Every tool has blind spots. These are this one’s.

  • It is an estimate built from your assumptions. It does not know your real traffic, rankings or market.
  • It treats every organic visit as equally likely to convert. Actual conversion rates can differ by query, page, and customer task; review your own segments.
  • It does not model seasonality, ranking volatility, or the delay between publishing and ranking.
  • Revenue is not profit. It does not subtract cost of goods, labor or overhead.
  • Attribution is simplified. Some organic leads would have found you through other channels anyway.
Questions

Frequently asked questions.

How do I find my organic conversion rate?

In Google Analytics, filter sessions to the Organic Search channel and use the session key event rate for a relevant action, or divide deduplicated qualified leads by sessions. Raw event counts can include several events from one session; do not substitute them for unique leads. If tracking is incomplete, record the gap. Self-reported discovery can supplement the record but does not reliably distinguish unpaid search from ads, maps, or other Google surfaces.

What is a good ROI for SEO?

There is no single benchmark that applies to every business, and we do not quote one. What matters is whether the estimated return clears your own margin and payback requirements. Use the cumulative column to see how long, at your assumptions, it would take to cover the spend.

Should I use first-sale value or lifetime value?

Use lifetime value if customers reliably come back (dental, HVAC maintenance, SaaS subscriptions). Use first-sale value if most customers buy once. If you are unsure, run both and treat the range as your answer.

Why does ROI start negative?

SEO usually costs money before it brings in traffic. If your inputs assume growth, the early months carry the same spend with less traffic. That is why the cumulative view matters more than any single month.

Does this calculator predict my results?

No. It shows what your numbers imply if they hold. It does not forecast rankings or traffic, and it is not a promise of any outcome.

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Privacy

What we collect

No forms, no email gate. The results are yours.

  • Everything is calculated in your browser. The numbers you type are not sent to our server.
  • Nothing is emailed, and you do not need an account.
  • We record anonymous usage events (for example, that the tool was used) without any of the values you entered.

Understand the terms behind this tool.

Organic traffic

Organic traffic is website traffic attributed to unpaid search results. A visit is a channel observation, not proof that the visitor became a qualified lead.

Conversion rate

Conversion rate is the share of a defined audience or set of visits that completes a defined action. Its meaning depends on the numerator, denominator, and reporting period.

Attribution

Attribution is assigning credit for an outcome to marketing interactions under a defined model. Different models and data limits can produce different answers from the same customer journey.

Key events (GA4)

Key events in GA4 are events marked as important to a business. Marking an event does not prove it represents a qualified customer, and Google Ads conversions have a distinct role.

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