CPA Calculator — Cost Per Acquisition

Use this CPA Calculator to calculate cost per acquisition, estimate advertising budget, forecast conversions and review conversion rate, CPC and ROAS.

CPA Calculator Acquisition Metrics
Total amount spent on the campaign.
Total leads, sales or completed actions.
Changes the display symbol only.
Add clicks to calculate CPC and conversion rate.
Add conversion revenue to calculate ROAS.

How to use the CPA Calculator

The CPA Calculator measures the average advertising cost required to generate one conversion. Enter ad spend and conversions to calculate CPA, or switch modes to estimate the budget needed for a conversion target and forecast how many conversions a budget can generate.

CPA is most useful when compared with conversion value, gross profit, lead quality and customer lifetime value. A lower CPA is only better when the conversions are valuable and correctly tracked.

CPA Calculator for Google Ads and Meta Ads

This CPA Calculator works for Google Ads, Meta Ads, LinkedIn Ads, TikTok Ads and other paid campaigns. Add clicks to calculate CPC and conversion rate, and add revenue to compare CPA with ROAS.

Frequently Asked Questions

CPA means cost per acquisition or cost per action. It shows the average amount spent to generate one lead, sale, customer or other conversion.
Divide total ad spend by total conversions. For example, $1,000 spent to generate 40 conversions equals a CPA of $25.
Not always. A low CPA can still be unprofitable if conversion value or lead quality is poor. Compare CPA with revenue, gross profit, ROAS and customer lifetime value.
Yes. This CPA Calculator runs fully in your browser. Your campaign numbers are not uploaded and no login is required.

Related tools

ROAS Calculator CPC Calculator CTR Calculator UTM Builder