Measure growth and marketing · Calculator
SEO ROI Calculator
Model SEO return from additional organic visits, customer conversion and gross profit. Compare expected profit against your campaign costs.
- No account needed
- Inputs stay in your browser
- Every formula shown
Find visits worth paying for
Searches with rising demand this week
Each has buyer intent, advertisers paying for clicks and a first page without dominant platforms.
Free weekly email
Get next week's list
Rising searches and the fastest-growing AI companies, once a week. No card, unsubscribe any time.
What is SEO ROI?
SEO return on investment compares the gross profit from additional organic visitors with what the SEO work costs in the same month.
How the calculation works
New customers = additional visits × conversion rate. Gross profit = new customers × same-month revenue per customer × gross margin. ROI = (gross profit − SEO cost) ÷ SEO cost.
Worked example
10,000 additional visits at 1% conversion produce 100 customers. At $100 revenue each and 80% gross margin, gross profit is $8,000. Subtracting $3,000 in SEO costs gives $5,000 and 166.67% ROI.
Assumptions and limitations
Use incremental visits, not all existing traffic. This is a steady-month scenario, not a ranking or ramp-up forecast. It excludes repeat purchases and future subscription payments. ROI is undefined with zero SEO cost.
Frequently asked questions
What are incremental visits?
Only the visits the SEO work adds, not your existing organic traffic. Crediting the whole channel to new work overstates the return.
Where do I get the conversion rate?
From your own analytics: new customers from organic search divided by organic visits over the same period. A visit is not a person, so this is a rate per visit.
Why gross margin rather than revenue?
Revenue overstates what a customer is worth. Gross margin removes the direct cost of serving them, so the result is closer to money you can spend.
Why only same-month revenue?
It keeps the model conservative and simple. Subscriptions and repeat purchases make the true return larger, and rankings usually take months to arrive, so early months can show a loss.
Keep researching
Explore all free toolsCompound Monthly Growth Rate Calculator
Calculate CMGR, total percentage growth and absolute change from your starting and ending values.Example · Compounded monthly growth5.95%Calculator · 5 inputsWebsite Worth Calculator
Estimate website value from monthly profit and your chosen multiples. Compare three scenarios without sharing your financial data.Example · Base scenario$120,000Calculator · 4 inputsSaaS Valuation Scenario Calculator
Explore low, base and high SaaS valuation scenarios using your annual recurring revenue and chosen multiples.Example · Base scenario$300,000Beyond your own assumptions
Research the market behind your assumptions
Night Watcher helps you investigate companies and search demand before deciding what to build: traffic, growth, pricing and the searches buyers are making.