Book a Free Strategy Call →

Customer Acquisition Cost (CAC) Calculator

Enter your sales & marketing spend and new customers to get your CAC — and check it against LTV to see if your acquisition is healthy.

Get a free PPC audit

Enter your numbers

£
#
£
Customer acquisition cost
LTV : CAC ratio

How to calculate CAC

CAC = Total sales & marketing spend ÷ New customers. £5,000 to win 50 customers is a £100 CAC. Include all acquisition costs, not just ad spend, for a true figure.

The LTV:CAC benchmark

A healthy business aims for an LTV:CAC ratio of at least 3:1 — each customer is worth 3× what it costs to acquire them. Below that, growth gets expensive.

Frequently asked questions

How do I calculate CAC?

Divide total sales and marketing spend by the number of new customers acquired.

What is a good LTV:CAC ratio?

3:1 or higher is the widely-used benchmark for sustainable, profitable growth.

Is this free?

Yes — no sign-up.

Numbers not adding up?

If the figures aren't where you want them, I'll find exactly where your Google Ads budget is leaking — free, no obligation.

Call 07410 907 104 Get a free PPC audit