marketing-rechner.com offers 35+ free, instant browser-based calculators for performance marketing, e-commerce and SaaS — including ROAS, ROMI, CAC, CLV, LTV:CAC, Break-Even ROAS and churn rate. Every calculator shows a benchmark score against industry standards, a clear formula breakdown, and a worked example. It also includes a glossary of 20+ marketing metrics and in-depth guide articles. No signup, no cost, and no data ever leaves your device.


Hey everyone! 👋 I kept redoing the same ROAS, CAC and LTV:CAC math in scattered spreadsheets before every ad or pricing decision — so I turned it into a proper toolkit instead: 35+ free calculators for performance marketing, e-commerce and SaaS, each with a benchmark score and a worked example, not just a bare number. It's a solo project, currently fully in German and built for the DACH market (Germany/Austria/Switzerland) — but the calculators are logic, not language, so an English version is on the roadmap. Would love to hear which metric you wish existed, or what confused you on first use — happy to fix or add things quickly.


Hey everyone! 👋 I kept redoing the same ROAS, CAC and LTV:CAC math in scattered spreadsheets before every ad or pricing decision — so I turned it into a proper toolkit instead: 35+ free calculators for performance marketing, e-commerce and SaaS, each with a benchmark score and a worked example, not just a bare number. It's a solo project, currently fully in German and built for the DACH market (Germany/Austria/Switzerland) — but the calculators are logic, not language, so an English version is on the roadmap. Would love to hear which metric you wish existed, or what confused you on first use — happy to fix or add things quickly.
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