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CPA Calculator: Cost per Acquisition

Enter your ad spend and the number of purchases (or leads) it produced. Add your order value and margin to see how it compares with the most you can afford.

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  • Live as you type
  • Compared with your limit
whatscales.io · CPA calculator
[ How it works ]

Three steps

  1. Enter your ad spendFor one campaign, one ad or the whole account.
  2. Enter the conversionsPurchases, leads or sign-ups over the same period.
  3. Compare with your maximum CPAOrder value × gross margin: above it, the first order loses money.
[ Reference ]

The CPA formula

CPA = ad spend ÷ conversions

$2,500 of spend for 80 purchases is a CPA of $31.25.

What is a good CPA?

One below your maximum CPA, which is your order value multiplied by your gross margin. Find yours with the break-even calculator.

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Open the tool →Break-Even ROAS Calculator

The ROAS where ads stop losing money.

Open the tool →CTR Calculator

Click-through rate from clicks and impressions.

Open the tool →Ad Library Video Downloader

Save an ad's video from an Ad Library link.

Open the tool →Ad Transcript

Read the script of a video ad we hold.

Open the tool →

See all 10 free tools →

[ FAQ ]

Questions

About this tool.

What does CPA mean?

Cost per acquisition (or cost per action): what you pay in ads for one purchase, lead or sign-up.

What is a good CPA?

One below your maximum CPA, which is your order value multiplied by your gross margin.

What is the difference between CPA and CAC?

CPA usually counts ad spend per conversion in an ad platform. CAC counts every acquisition cost (ads, tools, salaries) per new customer.

The tool is free. The ads are the product.

WhatScales shows what your competitors run and scale: every ad as a video, ranked inside its brand each day, with its hook, angle and transcript.

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