OomTools

Customer Acquisition Cost (CAC) Calculator

Knowing what it costs to win a customer is half the picture; the other half is how that compares to what they're worth over time. This works out your CAC from total sales-and-marketing spend and the customers it brought in, so you can tell profitable growth from the expensive kind.

  • 100% free
  • Private & safe
  • Runs in your browser

Why use Customer Acquisition Cost Calculator?

Customer Acquisition Cost Calculator turns your inputs into a clear, realistic estimate so you can plan, price and compare with confidence.

  • Runs instantly in your browser — nothing to install, nothing uploaded.
  • Completely free, with no account, no watermarks and no usage limits.
  • CAC = sales & marketing spend ÷ new customers
  • Enter your total sales and marketing spend for a period.
  • Works on any device — desktop, tablet and phone — and is fully keyboard accessible.

How to use Customer Acquisition Cost Calculator

  1. Enter your total sales and marketing spend for a period.
  2. Enter the number of new customers acquired.
  3. See your customer acquisition cost.
  4. Compare CAC with customer lifetime value.

Examples

  • $3,000 spend for 120 customers = a $25 CAC.
  • Checking CAC stays well below lifetime value.

Supported formats & limits

  • CAC = sales & marketing spend ÷ new customers

Limitations

  • Include all acquisition costs (ads, tools, salaries) for a true CAC.
  • CAC only makes sense next to lifetime value (LTV).

Frequently asked questions

What's a healthy CAC?

Generally an LTV:CAC ratio of about 3:1 or better is considered healthy.

What should I include in spend?

All costs to acquire customers — ad spend, marketing tools and relevant salaries.

Why compare CAC to LTV?

If it costs more to acquire a customer than they're worth over time, growth loses money.

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