Marketing
CAC Calculator
Calculate the average customer acquisition spend required to acquire one new customer during the same measurement period.
Enter your values
Include the sales and marketing costs your business considers part of customer acquisition for the same measurement period.
First-time customers gained during the same reporting period.
Results
Customer acquisition cost
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Enter acquisition spend and new customers from the same period.
Customer acquisition spend
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The acquisition costs included for the period.
New customers acquired
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First-time customers acquired during the same period.
Results are estimates based on the values entered and are provided for general planning.
Method
How to calculate CAC
This calculator uses blended CAC: all included sales and marketing acquisition spend divided by all new customers gained in the same period.
Formula
CAC = Customer acquisition spend ÷ New customers acquired during the same period
Assumptions
- This calculator uses blended CAC, not paid-media-only CAC.
- Spend and new customers cover the same reporting period.
- Spend includes every sales and marketing acquisition cost you choose to attribute.
Division retains full numeric precision. Currency displays two decimals; customer counts display as whole numbers.
How to interpret the result
CAC is the average acquisition cost for the scope you entered, not the cost of every individual customer. Compare it with consistently defined customer value and the time needed to recover acquisition spend. Keep channel, customer, and cost definitions consistent before comparing periods.
Choose a consistent CAC cost basis
CAC changes when the cost scope changes. A media-only calculation can help compare advertising channels, while a fully loaded blended CAC can include people, tools, agencies, creative work, and sales costs. Neither is automatically correct for every decision; the label and consistent method make the number useful.
Match spend and new customers to the same reporting window. Sales cycles can create timing differences, so monthly CAC may be volatile when costs occur before customers convert. Longer periods or cohort analysis can provide a more stable view.
Use CAC with value and payback
CAC alone does not show whether acquisition is profitable. Compare it with consistently defined customer value and estimate how quickly customer contribution recovers the acquisition cost. A lower CAC is not necessarily better if it brings customers with lower retention, purchase value, or margin.
CAC measures compared
The correct version depends on which acquisition decision you are evaluating.
| Measure | Formula | What it shows |
|---|---|---|
| Blended CAC | All included acquisition spend ÷ All new customers | Average acquisition cost across the selected business scope. |
| Paid CAC | Paid acquisition cost ÷ New customers attributed to paid channels | Acquisition efficiency for the included paid channels. |
| Revenue LTV to CAC | Revenue LTV ÷ CAC | Lifetime revenue relative to acquisition cost; not a profit ratio. |
Frequently asked questions
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