Google Ads Cost Per Conversion Calculator
Work out what each lead, booking or sale actually costs you. Add your close rate and customer value to see your cost per acquisition and margin too.
The Cost column in Google Ads, for the period you are measuring.
Leads, calls, bookings or sales recorded in the same period.
The two below are optional. Add them and the calculator also works out what you pay for a paying customer, not just an enquiry.
Enquiries that become customers.
What one customer is worth to you.
Paying too much per conversion? Start with your landing page
Want to know which metric you should follow to determine the success of your ads? Sure, you might get cheap clicks, but, likely, it is a waste of ad spend.
Enter cost per conversion: the number that tells you if your campaign is successful.
This metric tells you how much it costs you to get one lead, one booking, or one sale. Everything else is noise.
But do not worry, the calculation is simple. People often misinterpret the metrics. If you want to understand the numbers, keep reading.
How to Use This Tool
Enter your total ad spend for the period and the number of conversions you recorded, and the tool calculates your cost per conversion instantly.
To find these numbers in Google Ads, go to your Campaigns view and check the "Cost" column for your spend.
For conversions, make sure conversion tracking is set up. Without it, Google Ads cannot record conversions.
If your conversions column is empty or showing zero, read our landing page requirements for PPC guide, which covers setup and reveals the secrets to drive conversions.
How to Read Your Result
A cost per conversion figure on its own tells you nothing. Such a number only makes sense when you hold it against what a customer is worth to your business.
The general benchmark for UK lead generation is £10 to £50 per conversion.
That is a wide range because the right number for a law firm is completely different for a takeaway.
You have to factor in your industry, competition, location, and the quality of the campaign.
Here is how to properly frame your result.
£60 a lead that becomes a £2,000 client is outstanding.
If you close one in three enquiries and your average client is worth £2,000, each conversion is worth roughly £667 to your business.
Paying £60 to generate that enquiry is one hell of a return because you spend £60 and make almost ten times that back.
£40 a lead for a customer worth £80 is marginal.
However, if your average order value is low and customers rarely return, then you might have to reconsider your approach.
For example, with a 30% close rate, you spend £40 to generate a customer worth £24 in profit.
You will lose money.
Toolmix, a tool hire business, achieved a cost per conversion of £10.67 in a single month through a strong PPC campaign.
For a business where a single hire booking generates impactful revenue, that number represents a strong return on every pound spent.
The Gentle Mind, a therapy practice, pays around £18 per enquiry through Google Ads.
And for a service where a new client attends multiple sessions, that is, a repeat customer, that cost per conversion is highly profitable.
Neither is good or bad in isolation.
But it proves the value of understanding how much a customer is worth to your business, and how much you will willingly pay to acquire them.
If you do not know your customer lifetime value, calculate it before you judge your cost per conversion.
Take your average transaction value, multiply it by how often a customer buys per year, then multiply again by how many years a typical customer stays.
Treat this number as your ceiling. Your cost per conversion needs to be below it to hit desirable profit.
Now, many folks get confused or struggle to differentiate between the following three terms.
And we are going to explain them to you.
Cost per click (CPC) is how much you pay when someone clicks your ad. That is it.
Cost per conversion is what you pay to get a defined action, such as a lead form submission, a call, or a purchase. If you judge your campaign by one statistic, make it this one.
Cost per acquisition (CPA) goes one step further. CPA measures the cost of acquiring a paying customer, accounting for your close rate.
So, if your cost per conversion is £30 and you close 50% of enquiries into paying clients, your cost per acquisition is £60. That is the number to compare against customer lifetime value.
All three have a role.
CPC is useful for measuring click rates. Cost per conversion tells you whether your ads and landing pages work together. CPA tells you whether the whole system is profitable.
How to Improve Your Cost Per Conversion
Is your number too high? Apply these changes to fix your campaign and make a profit.
1. Fix Your Landing Page First
Time and time again, the first problem is almost always the same. And this is the landing page.
If your ad is relevant, your click-through rate is solid, but your conversion rate tells a different story, the landing page is your problem.
A landing page built for PPC is not the same as your homepage. It does not need your about story, philosophy, founder message, or B-Corp badges.
A successful landing page built for PPC is simple.
This means a single, clear message to match the ad, the reason people clicked through in the first place, a specific call to action, and no distractions from the conversion goal.
Add a simple form with no more than five fields to fill, a phone number at the top, and one clear reason to act now, and this will outperform a generic service page every time.
2. Add Negative Keywords
Irrelevant clicks might just be the most direct cause of a high cost per conversion.
If your ads show up on irrelevant searches, every one of those clicks inflates your cost because the clicker will almost definitely not make a purchase.
Check your Search Terms report in Google Ads.
Next, look for searches that triggered your ads but have no realistic chance of converting. Research queries, competitor names, wrong locations, and wrong intent will be the main offenders.
Now add them to your negative keyword list. This simple, quick fix can reduce wasted ad spend by 20 to 40 per cent.
3. Tighten Your Match Types
Broad match keywords give Google significant freedom to decide which searches trigger your ads. But this costs money.
Moving high-spend keywords from broad to phrase or exact match puts you back in control and focuses spend on searches closer to your offer.
If you have not already formatted your keywords correctly for each match type, use our Google Ads keyword match type formatter to get the syntax right before you upload them.
4. Improve Your Quality Score
But what is the Quality Score? This is how Google measures the relevance and quality of your keywords, ads, and landing pages. So you must get it right.
A higher Quality Score lowers your cost per click, which directly reduces your cost per conversion.
Google measures the following three components:
- click-through rate
- ad relevance
- the customer's landing page experience
Tightly themed ad groups always outperform broad campaigns.
Make your ads and campaign relevant to the customer search, and watch your Quality Score skyrocket and costs drop.
5. Raise Your Bid on What Already Converts
Run your campaign long enough, and you will learn which keywords and ad groups make the most profit at the cheapest cost.
Next, increase your bids on these terms and reduce spend on terms that flop.
Why? Because this rebalances your budget toward the higher return on investment.
Use target CPA bidding once you have enough conversion data.
For most, this is 30 or more conversions in the last 30 days. Before that, manual bidding or enhanced CPC gives you more control during the learning phase.
6. Review the Whole Funnel
Sometimes the issue is not the ads at all. A high cost per conversion can reflect a weak offer, a slow page, a confusing checkout, or a form that asks for a customer's life story.
A strong click-through rate but low conversions mean there is a hidden issue.
Test your landing page on mobile. Is your form a pain to complete? Is your call to action specific?
In our experience, small friction points increase acquisition cost.
For a deeper look at what causes campaigns to underperform, our how much do Google Ads cost article explains budgeting and efficiency.
Our PPC management service page, however, explains how we approach campaign structure for clients across different budgets and industries.
Want to Lower Your Cost Per Conversion and Raise Profits?
Let us talk. Far too many businesses lose new customers because the funnel leaks profits somewhere along the line.
Our PPC experts at CreateTheWeb help small and large businesses discover these mistakes to create successful campaigns.
Get in touch today to find out how our PPC experts can give you the edge over your competitors.
Frequently Asked
Questions about this tool
There is no universal answer, and anyone who gives you one without knowing your business is guessing. For UK lead generation, £10 to £50 is a typical range. But the only meaningful benchmark is your own customer value. For example, if a conversion is worth £500 to your business, paying £80 for it is acceptable. If it is worth £60, paying £40 for it is a problem. Work out what a customer is worth to you first, then judge your cost per conversion against that number.
Cost per click is what you pay every time someone clicks your ad. Cost per conversion is what you pay to get a defined outcome, such as a lead, a purchase, or a booking. A low cost per click means nothing if those clicks do not convert. A slightly higher cost per click on a well-targeted keyword that converts consistently will almost always outperform cheap clicks on broad terms with poor intent.
Cost per conversion is what you pay for a recorded action, such as an enquiry form or a phone call. Cost per acquisition is what you pay for a paying customer, which means it also accounts for how many of those enquiries you actually close. If your cost per conversion is £30 and you convert half of your enquiries into customers, your cost per acquisition is £60. Cost per acquisition is the figure to hold against customer lifetime value, because it reflects the full cost of winning the business.
It could be because a landing page does not match the ad intent, no filter for negative keywords, or a low Quality Score that raises your costs. Check each in order. Start with your Search Terms report to identify wasted spend, then look at your landing page conversion rate, then review your Quality Scores. This issue usually has a specific, fixable cause.
Four things move the needle. And that is adding negative keywords to cut irrelevant clicks, improving your landing page to convert more of the traffic, tightening match types to focus spend on high-intent searches, and improving Quality Score by making your ads and landing pages more relevant to your keywords. Improving your close rate offline will also improve your effective cost per acquisition, even if your cost per conversion stays the same.