Business calculator
Free Customer Acquisition Cost Calculator
Calculate average acquisition spend per new customer.
Customer Acquisition Cost Calculator
Practical business calculation
Measure acquisition spend per new customer
Customer acquisition cost divides acquisition spending by the number of new customers acquired. Keep the spending period and customer count aligned when using the result.
Acquisition spend
Include the marketing or acquisition costs you want to evaluate.
New customers
Use customers acquired in the same period and under the same definition.
CAC is an average
The result describes average acquisition cost, not the cost of every individual customer.
No customers
CAC cannot be calculated without at least one acquired customer.
How to use this calculator
Enter the assumptions you already have
- 1
Add your figures
Use the inputs that match the period or decision you are analyzing.
- 2
Choose a currency
The shared currency setting keeps monetary results readable across supported currencies.
- 3
Review the result
Use the breakdown to check the arithmetic before applying it to a business decision.
What CAC means
CAC is a planning metric for the average cost of acquiring a new customer. It can be calculated narrowly for one campaign or more broadly for a marketing period, as long as the scope is clear.
Costs to include
Depending on the question, acquisition spend may include advertising, campaign tools, agency fees, sales commissions, or relevant staff costs. Apply one consistent definition when comparing periods.
CAC and customer value
CAC is often reviewed beside customer lifetime value. Neither number alone proves that a customer relationship is profitable; margins, timing, retention, and service costs also matter.
Example: $50 CAC
Acquisition spend: $10,000 New customers: 200 CAC: $10,000 ÷ 200 = $50
Common mistakes to avoid
Frequently asked questions
Practical questions people ask about this tool
What is the CAC formula?
CAC equals acquisition spend divided by the number of new customers acquired.
What happens when new customers are zero?
The calculator does not show Infinity; it asks for at least one customer.
Should sales costs be included?
They can be included when they are part of the acquisition scope you are measuring. State the definition and use it consistently.
Is lower CAC always better?
Not by itself. A lower acquisition cost may matter less if the resulting customers have lower retention, margin, or value.
Related tools
Compare acquisition cost with customer value
Customer Lifetime Value Calculator
Estimate lifetime revenue and gross profit.
Average Order Value Calculator
Calculate average transaction size.
ROI Calculator
Compare gain with an investment base.
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