CPA Calculator
Find out exactly what each conversion costs. Enter your total ad spend and number of conversions to calculate cost per acquisition (CPA) instantly, with the formula explained and 2026 benchmarks across industries for context.
Calculate your CPA
How to calculate CPA
If you want to know how to calculate CPA, the formula is simply total ad spend divided by the number of conversions. Spend $5,000 to generate 200 conversions and your CPA is $25.00. That single number is the clearest way to judge whether a channel is paying its way.
This CPA calculator does the division for you in one click. The same logic answers how to calculate cost per acquisition for any objective — leads, free trials, app installs, or e-commerce sales — as long as you count conversions consistently and align the spend window with the conversion window.
CPA benchmarks by industry in 2026
What counts as a healthy CPA depends entirely on your average order value or customer value. These 2026 Google Ads search averages provide a reference point.
| Industry | Average CPA (2026, search) |
|---|---|
| All industries (average) | ~$53.50 |
| All industries (median) | ~$23.70 |
| Technology / SaaS | ~$133 |
| B2B services | ~$116 |
| Automotive | ~$33 |
High-value, long-cycle categories like technology and B2B carry the highest CPAs because each customer is worth far more, while high-intent verticals like automotive convert more cheaply.
How to use this calculator
- Enter your total ad spend. Add the full media cost for the campaign and period you want to measure. Keep the spend window and conversion window aligned.
- Add your number of conversions. Enter how many conversions the spend produced. Learning how to calculate cost per acquisition starts with a clean, consistent conversion definition.
- Read your CPA and benchmark it. The tool returns your cost per acquisition. Compare it to your target CPA and to the 2026 industry ranges below to see if your campaigns are efficient.
Frequently asked questions
How do you calculate CPA?
Divide total ad spend by the number of conversions. If you spent $2,000 and got 80 conversions, your CPA is $25. That is the core of how to calculate cost per acquisition for any campaign. The CPA calculator above does this instantly.
What is a good CPA in 2026?
It depends on customer value. The 2026 cross-industry average CPA on Google search is around $53, with a median near $24, but technology and B2B routinely run above $100 because each customer is worth more.
What is the difference between CPA and CPC?
CPC is the cost of a single click; CPA is the cost of a completed conversion. CPA is downstream of CPC and conversion rate, which makes it a better measure of true campaign efficiency.
How can I lower my CPA?
Improve landing page conversion rate, tighten targeting to higher-intent audiences, refine creative, and use smart bidding toward conversion goals. Raising conversion rate lowers CPA even if your CPC stays flat.
CPA, ROAS, and LTV together
CPA only tells half the story. A $50 CPA is excellent if each customer is worth $500 in lifetime value and terrible if they are worth $30. Always read CPA next to average order value, ROAS, and customer lifetime value so you optimize toward profit, not just toward a low acquisition cost.