Cost Per Conversion Calculator
Find how much you pay per conversion.
Results update as you type.
How it works
Cost per conversion tells you the average amount you spend to achieve one conversion, and this calculator finds it from your ad spend and conversion count. You enter the total advertising spend and the number of conversions it produced, and it returns the cost per conversion. A conversion is any action you have defined as a success, whether a sale, a lead form submission, an app install, a newsletter sign-up, or a booking, so the metric adapts to whatever goal your campaign targets. Cost per conversion is one of the clearest measures of advertising efficiency because it ties spend directly to results, not just to clicks or impressions. A lower cost per conversion means your budget is working harder, and comparing it across campaigns, keywords, audiences, and channels shows you where to shift money. It is closely related to cost per acquisition, and the two terms are often used interchangeably when the conversion is a new customer. Always interpret it alongside the value of each conversion: a higher cost per conversion can still be profitable if those conversions are worth much more. Enter your ad spend and conversions to compute your cost per conversion.
Cost per conversion = total ad spend / conversions
Cost per conversion divides the total spent on advertising by the number of conversions it generated. A conversion is any completed goal that matters to you, such as a purchase, sign-up, or download. The result is the average cost of producing one conversion, which reveals how efficiently your ad budget turns into the outcomes you care about.
Source:Marketing analytics
We review all our tools from time to time to ensure accuracy.
Worked example
How to use this calculator
- 1
Enter your values
Enter total ad spend and conversions.
- 2
Adjust the options
Fine-tune any options to match your situation.
- 3
Read your result
Cost per conversion updates instantly as you type — no button to press.
Frequently asked questions
What is cost per conversion?
Cost per conversion is the average amount of advertising spend required to produce one conversion, found by dividing total ad spend by the number of conversions. A conversion is any goal you value, such as a sale or sign-up. It measures how efficiently your advertising budget delivers the outcomes that matter to your business.
How is it different from cost per click?
Cost per click measures what you pay each time someone clicks your ad, regardless of whether they take further action. Cost per conversion measures what you pay for each completed goal, such as a purchase. Since not every click converts, cost per conversion is always at least as high as cost per click and reflects true results.
Is cost per conversion the same as cost per acquisition?
They are closely related and often used interchangeably. Cost per acquisition usually refers specifically to acquiring a paying customer, while cost per conversion can refer to any defined conversion goal, which might be a lead or sign-up rather than a sale. When the conversion is a new customer, the two are effectively the same.
How can I lower my cost per conversion?
Improve targeting to reach people more likely to convert, refine ad creative and landing pages to lift conversion rate, pause underperforming keywords or audiences, and shift budget to the best-performing channels. Because cost per conversion depends on both ad costs and conversion rate, gains in either lower it, so testing and optimisation on both fronts help.
What is a good cost per conversion?
It depends entirely on the value of a conversion. If each conversion earns you far more than it costs, even a high cost per conversion is profitable; if margins are thin, it must stay low. Compare cost per conversion to the revenue or lifetime value each conversion generates rather than to a fixed benchmark.