CPA Calculator: Calculate Your Cost Per Acquisition
Calculate your Cost Per Acquisition (CPA) instantly. Enter your total cost and conversions to understand how much you're paying to acquire each customer.
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What is CPA?
Cost Per Acquisition (CPA) measures how much it costs to acquire a customer or conversion. It's essential for understanding your marketing efficiency and determining sustainable customer acquisition costs.
CPA Formula
CPA = Total Cost ÷ Number of ConversionsCPA Benchmarks by Industry
Acceptable CPA depends heavily on customer value:
- E-commerce: $10-50 for a first purchase
- B2B SaaS: $100-500 (justified by LTV)
- Lead generation: $20-100 depending on quality
- Mobile apps: $1-5 for an install
Frequently Asked Questions
What is a good CPA?
A good CPA is lower than your gross margin per customer. If your margin is $50, your CPA should be under $50 to be profitable on first purchase.
CPA vs CAC: What's the difference?
CPA measures the cost of a conversion (purchase, lead). CAC (Customer Acquisition Cost) measures total cost to acquire a new customer, including all channels.
How can I reduce my CPA?
Improve targeting, optimize landing pages, test creatives, exclude non-converting audiences, and work on your conversion funnel.
What CPA/LTV ratio should I target?
Aim for an LTV:CPA ratio of at least 3:1. If a customer is worth $300 over their lifetime, you can spend up to $100 to acquire them.
Does CPA vary by season?
Yes, CPA typically increases during competitive periods (Black Friday, Christmas) and may decrease during slower seasons.
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