無料のオンライン CPA calculator. 計算 cost per acquisition, total ad spend, or required conversions for your marketing campaigns. Compare against industry benchmarks for ecommerce, SaaS, B2B, and more. 純クライアントサイド, 広告なし.
Cost Per Acquisition (CPA), also known as Cost Per Action, is the average amount you spend to acquire one customer or lead through your marketing efforts. The formula is: CPA = 合計 Ad Spend / Number of Conversions. CPA is a critical metric for measuring the efficiency and profitability of your marketing campaigns. A lower CPA means you are acquiring customers more cost-effectively. This calculator helps you quickly compute CPA, required budget, or achievable conversions — whichever two values you know. All calculations happen entirely in your browser — no data is ever sent to a server.
Cost Per Acquisition (CPA) is the average amount an advertiser pays to acquire one customer or lead through a marketing campaign. The formula is: CPA = 合計 Ad Spend / Number of Conversions. For example, if you spent $5,000 on marketing and acquired 100 customers, your CPA is $50. CPA is a key metric for evaluating the cost-effectiveness and ROI of marketing campaigns.
A good CPA varies significantly by industry and business model. E-commerce typically ranges from $10-$50, SaaS from $50-$300, B2B from $100-$500, finance from $100-$300, healthcare from $50-$200, and legal services from $200-$1,000. The most important benchmark is your customer lifetime value (LTV) — a good CPA is one where your LTV:CPA ratio is at least 3:1.
To lower CPA: improve ad targeting to reach more qualified audiences, optimize landing pages for higher conversion rates, test different ad creatives and copy to improve relevance, use retargeting campaigns which often have lower CPAs, refine your audience segments based on high-converting demographics, improve your offer or value proposition, reduce friction in your signup/purchase process, and leverage organic channels (SEO, content marketing) to supplement paid acquisition.
CPC (Cost Per Click) measures the cost of each click on your ad, while CPA (Cost Per Acquisition) measures the cost of each actual conversion or customer acquired. CPC focuses on traffic generation, while CPA focuses on business outcomes. For example, you might have a $2 CPC but a $50 CPA if only 4% of clicks convert. Both metrics are important — CPC helps optimize ad efficiency, while CPA helps optimize overall campaign profitability.