Lead Generation

Google Ads ROI Calculator

Estimate how much revenue your Google Ads budget could generate based on clicks, enquiries, conversion rate, close rate, and average job value.

Currency

Monthly Google Ads budget

Enter the amount you plan to spend on Google Ads each month.

Average cost per click

Use your expected or historical average cost for each ad click.

Landing page conversion rate (%)

Estimate the percentage of ad clicks that become genuine enquiries.

Close rate (%)

Enter the percentage of enquiries that usually become paying customers.

Average job value

Use the average revenue earned from one completed job.

Estimated Results

Estimated ROI

2000%

Estimated leads

Estimated customers

Estimated revenue

€10,500

Cost per lead

€25

What this means

Monthly leads

New customers

Monthly revenue

€10,500

A monthly Google Ads budget of €500 at an average cost per click of €3 could generate approximately 200 clicks.

At a landing page conversion rate of 10%, those clicks could produce around 20 enquiries. At a 35% close rate, that could result in approximately 7 paying customers.

With an average job value of €1,500, the estimated monthly revenue would be €10,500. The estimated cost per lead is €25 and the estimated cost per customer is €71.

These figures are estimates based entirely on the inputs provided. Actual Google Ads performance can vary because of competition, search demand, targeting, ad quality, landing page performance, lead quality, seasonality, and other factors.

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Understanding Your Result

How Google Ads ROI Works

How Google Ads ROI is calculated

ROI = (Revenue − Ad Spend) ÷ Ad Spend × 100

The calculator estimates clicks from your budget and cost per click, converts those clicks into enquiries and customers, then compares the resulting revenue with the advertising spend.

ROI here is based on revenue

The calculation subtracts Google Ads spend from estimated revenue, but it does not deduct labour, materials, overheads, tax, or other costs of completing the work. A positive advertising ROI does not automatically mean every resulting job is profitable.

Google Ads ROI Calculator FAQs

How is Google Ads ROI calculated?+

This calculator estimates revenue from the clicks, enquiries, and customers your ad budget could generate, subtracts the advertising spend, and divides the difference by that spend to produce an estimated ROI percentage.

What is cost per lead?+

Cost per lead is the amount of advertising spend required, on average, to generate one enquiry. It is calculated by dividing total ad spend by the number of leads generated.

What conversion rate should I use?+

Use your own historical landing page or website conversion rate whenever possible. If you do not have reliable data, treat the figure you enter as a planning assumption rather than a guaranteed result.

Does a positive Google Ads ROI mean the campaign is profitable?+

Not necessarily. This calculator compares estimated revenue with ad spend. Labour, materials, overheads, tax, and other job costs still need to be considered when judging actual profitability.

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