CLV. What it is and calculation tool
The Customer Lifetime Value (CLV) is one of the most useful metrics to understand what a customer is truly “worth”—not in terms of a single transaction, but across the entire relationship with your business. In simple terms, CLV answers a straightforward yet critical question: if I acquire a customer today, how much economic value will they generate over time? This perspective reshapes how you evaluate marketing, sales, and customer success: it’s not only about immediate revenue, but about how effectively you keep customers active, satisfied, and coming back for repeat purchases.
CLV becomes even more powerful when compared with CAC (Customer Acquisition Cost), i.e., how much it costs to acquire a new customer. If CAC is high and CLV is low, growth can become expensive and ultimately unsustainable. On the other hand, a strong CLV relative to CAC suggests the company is investing efficiently and recouping the acquisition cost over time. The CLV/CAC ratio is often used as a health check: below 3 indicates pressure on sustainability, between 3 and 6 typically signals a healthy balance, and above 6 may mean customer value is very high—or that acquisition spend is too low and the business could scale faster by investing more in growth.
There are two valid approaches to calculating CLV, as long as the underlying data is consistent.
The first approach is useful when you don’t know the average customer lifespan and want to estimate it:
Customer Lifespan = 1 / (Customers who purchase only once / Total customers). Here, the share of customers who make only one purchase during the year is used as a proxy for the “churn rate.” Once you estimate the lifespan, you can calculate the average annual value per customer:
Average Customer Value = Revenue / Total customers. And finally: CLV = Average Customer Value × Customer Lifespan
The second approach is more direct when you already know the average lifespan (or can estimate it reliably from historical data):
Average Customer Value = AOV × Purchase Frequency. Then: CLV = Average Customer Value × Customer Lifespan
Where "AOV" stands for Average Order Value.
In both cases, the goal is the same: turning sales and purchasing behavior into a clear measure of long-term economic value—one that can be compared with CAC to guide concrete decisions on budget allocation, channel mix, pricing, and retention strategy. Keep in mind that, when calculating CAC, the marketing investment should be considered totally, not only the portion strictly tied to pure customer acquisition.
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Use the calculator below for a quick and simple first assessment!