# ramen.is > AI-optimized mirror of ramen.is containing 7 pages totalling 571 words of clean markdown content, structured data, and semantic HTML. Original source: https://ramen.is/. Last updated: 2026-06-15T10:24:32.574Z. Each page is available as HTML (with JSON-LD structured data) and Markdown (text-only, ideal for LLMs and RAG). ## Homepage - [Essential Business Calculators](/content/site-root.html): Free business calculators for CAC, Churn Rate, and LTV analysis. Make data-driven decisions for your business growth., Business calculator tools for Customer Acquisition Cost (CAC), Churn Rate, and Lifetime Value (LTV) analysis (155 words) ## Articles & Blog Posts - [about/index.html](/content/about/index.html) (1 words) - [LTV vs CAC Ratio Calculator](/content/calculators/ltv/index.html): Calculate and analyze your LTV to CAC ratio to optimize customer profitability and acquisition strategy, Business calculator tools for Customer Acquisition Cost (CAC), Churn Rate, and Lifetime Value (LTV) analysis (85 words) - [Terms of Service](/content/terms/index.html): Terms of service and usage conditions for Ramen.is business calculators, Business calculator tools for Customer Acquisition Cost (CAC), Churn Rate, and Lifetime Value (LTV) analysis (211 words) - [Customer Acquisition Cost Calculator](/content/calculators/cac/index.html): Calculate your Customer Acquisition Cost (CAC) to optimize your marketing spend, Business calculator tools for Customer Acquisition Cost (CAC), Churn Rate, and Lifetime Value (LTV) analysis (54 words) - [Churn Rate Calculator](/content/calculators/churn/index.html): Calculate your customer churn rate to improve retention strategies and reduce customer loss, Business calculator tools for Customer Acquisition Cost (CAC), Churn Rate, and Lifetime Value (LTV) analysis (64 words) - [privacy/index.html](/content/privacy/index.html) (1 words) ## Resources - [Full Page Index](/index.html): Browse all cached pages with rich metadata - [About This Cache](/content/about.html): Methodology, technical details, and usage guidelines - [XML Sitemap](/sitemap.xml): Machine-readable sitemap for crawler discovery - [Robots.txt](/robots.txt): Crawler directives