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CPA Calculator

CPA Calculator

cpa calculator Calculate cost per acquisition for paid ads, lead generation, ecommerce, and conversion campaigns.

Calculate cost per acquisition from ad spend and acquisitions or conversions for paid marketing campaigns.

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Use the CPA Calculator

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Cost per acquisition

$20.00

Acquisitions

120

Each acquisition costs $20.00 from this spend.

CPA means cost per acquisition. It shows how much ad spend is needed to produce one target action, such as a lead, signup, purchase, trial, booking, or qualified conversion.

The formula is simple: CPA = ad spend / acquisitions. If a campaign spends $2,400 and produces 120 acquisitions, the CPA is $20.00.

Use CPA when a campaign has a clear action you want to optimize. For lead generation, the action may be a submitted form. For ecommerce, it may be a purchase. For apps, it may be a signup or install.

CPA should be reviewed with context. A low CPA is not useful if the acquisitions are poor quality, and a higher CPA can still work if customer value, margin, or repeat purchase behavior is strong. Compare CPA with CPC, conversion rate, CAC, ROAS, ROI, and product margin before scaling spend.

How to use it

Step 1

Enter total ad spend for the campaign or reporting period.

Step 2

Enter the number of acquisitions, leads, purchases, or target conversions from the same period.

Step 3

Review the cost per acquisition.

Step 4

Compare CPA with CPC, conversion rate, CAC, ROAS, and margin before changing budget.

FAQ

What is CPA?

CPA means cost per acquisition. It estimates how much ad spend is needed for one acquisition, lead, purchase, or target conversion.

How do you calculate CPA?

Divide total ad spend by the number of acquisitions or target conversions from the same campaign window.

Is CPA the same as CAC?

No. CPA usually measures paid media cost per target action, while CAC can include broader sales and marketing cost per new customer.

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