Financial Calculators

Customer Acquisition Cost Calculator

Calculate CAC, lifetime value and the LTV:CAC ratio that tells you whether growth is profitable.

Every figure below is labelled in the currency you pick. Amounts are not converted — enter values in the same currency.

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$
years
Customer acquisition cost
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What makes up the totalprincipalinterestfeesChange one input and watch which block moves. That is usually more useful than the total itself.

Three to one is the usual benchmark

An LTV:CAC ratio below 1 means you lose money on every customer. Around 3:1 is the figure most SaaS investors look for. Much above 5:1 often means underinvestment in growth rather than efficiency — you could be spending more to acquire faster.

The formula

CAC = spend ÷ new customers; LTV:CAC = (value × retention) ÷ CAC

Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.

How to use the Customer Acquisition Cost Calculator

  1. Fill in each field with your own figures — the defaults are only there as an example.
  2. The result updates as you type, so there is no button to press.
  3. Check the breakdown under the main result for the supporting numbers.
  4. Use the copy button to take the result with you, or share the link to reload the same inputs.

Customer Acquisition Cost Calculator — frequently asked questions

Is this customer acquisition cost calculator free to use?

Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.

How accurate is the result?

The maths is exact for the formula shown on the page. Accuracy in the real world depends on your inputs and on assumptions the formula cannot see, so treat the output as a well-grounded estimate rather than a quote.

Can I use it on my phone?

Yes. The page is responsive, weighs a few kilobytes and works offline once loaded, so it behaves the same on a phone as on a desktop.

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About this calculator

Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.

Last reviewed August 23, 2026 · Calculation runs client-side · No data collected · Report an error