Free tool · Lab 03
CRO calculator: how much money are you leaving on the table?
Doubling your traffic costs money; a better conversion rate usually costs less, and the gain lasts. Enter your website’s figures and see the extra revenue — plus what the same result would cost if you bought it through ads.
Estimated extra revenue per year
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To get the same gain from ads alone, you would need
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An illustrative calculation: it assumes constant traffic and average value. The real increase in conversion depends on your starting point and on what exactly is improved; we establish it through an audit and A/B tests, not through promises.
Why conversion rate matters so much
The maths is simple. In this illustrative example, with 10,000 visitors a month, raising conversion from 1% to 1.5% means 50% more enquiries without spending a cent more on traffic. And the gain stays: every future visitor, from any source — Google, Facebook, email, organic — converts better.
The formulas the calculator uses:
- Conversions = visitors × conversion rate;
- Extra revenue = visitors × (new conversion rate − current conversion rate) × average value;
- Equivalent traffic = the additional visitors needed, at the current conversion rate, to produce the same number of extra conversions — multiplied by the average CPC.
To see how we work in practice — audit, behaviour analysis, prioritised hypotheses, A/B tests — see our conversion rate optimisation service.
Where lost conversions usually hide
- 01The value proposition
Visitors must understand within 5 seconds what you offer and why they should choose you.
- 02Proof
Reviews, figures, guarantees, examples — trust is built on the page.
- 03Forms and checkout
Removing unnecessary fields often increases the number of completions.
- 04Calls to action
Visible and clear, with an obvious next step.
- 05Speed and mobile
This is where most visitors are lost, silently.
Frequently asked questions
About conversion rate and CRO
What is a conversion rate?
The percentage of visitors who take the action you want: an order, a quote request, a call or a booking. If 2 out of every 100 visitors buy, the conversion rate is 2%.
What conversion uplift is realistic?
It depends on your starting point. Websites with obvious problems (slow, confusing, long forms) usually have the most to gain. We do not promise fixed percentages: we set hypotheses through an audit, then validate them with tests on real traffic.
Why do CRO before increasing my ad budget?
Because every channel becomes more profitable when the website converts better: the cost per enquiry in Google Ads and Meta Ads can fall in proportion to the rise in conversion. Increasing the budget on a website that leaks visitors means paying more for the same losses.
How do I find my current conversion rate?
From Google Analytics 4 (conversions ÷ sessions or users) or, more simply, by counting the orders or enquiries in a month and dividing them by that month’s visitors. If you are not tracking conversions yet, that is the first step.
Lab
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