Enter your sales and marketing spend and the new customers it won to get your customer acquisition cost.
How it works
Customer acquisition cost (CAC) is the average amount you spend to win one new customer. Enter your total sales and marketing spend for a period and the new customers acquired in that period. Add an optional lifetime value to also see the LTV:CAC ratio.
Formula: CAC = Total spend / New customers; LTV:CAC = LTV / CAC.
Advanced options let you enter your monthly margin per customer to also get the CAC payback period in months.
Everything runs in your browser. Your numbers are never sent to a server, and there is no signup or limit. Your last entries are remembered locally so the calculator is ready next time.
What you will see
- Customer acquisition cost
- Average spend to acquire one customer.
- LTV : CAC ratio
- Lifetime value divided by CAC. Around 3:1 is a common healthy target. Shown only when you enter an LTV.
Frequently asked questions
What is customer acquisition cost?
CAC is the average cost to acquire one new customer, including the advertising, content, salaries, and tools that drove those sign-ups. It is a core efficiency metric for any growth channel.
How do I calculate CAC?
Divide your total sales and marketing spend over a period by the number of new customers won in that period. For example, $5,000 spent to acquire 100 customers is a $50 CAC.
What should I include in the spend?
For a true CAC, include all acquisition costs: ad spend, content and creative, marketing and sales salaries, software, and agency fees. A spend that counts only ad budget understates your real CAC.
What is a good LTV:CAC ratio?
Around 3:1 is a widely cited healthy target: each customer is worth roughly three times what you paid to acquire them. Much lower can mean you are overspending; much higher can mean you are underinvesting in growth. Enter an LTV here to see your ratio.
Is this CAC calculator free?
Yes, free with no signup. It runs entirely in your browser, so your numbers stay on your device.