Free SaaS metrics calculators

Nine interactive calculators covering retention, churn, lifetime value, revenue concentration and dormant revenue. No signup, no account, and nothing you type leaves your browser.

New — and the one to start with if you have the data. The SaaS Churn & Revenue-Quality Analyzer takes the target's per-customer, per-month subscription CSV and runs all six lenses of the 5-Risk Buyer-Side Method on the real ledger: churn divergence (revenue churn against logo churn, split into cancellations and downgrades), revenue concentration and HHI, the annual-plan renewal cliff, zombie MRR, a cohort retention triangle, and an A–F revenue-quality grade with ranked findings and the question to put to the seller for each one.

It parses the file in your browser and uploads nothing — which is the point when a target's customer-level revenue ledger is covered by an NDA. Every other tool on this page works from summary figures; this one works from the ledger itself.

The maths is open source. Every formula here is published under MIT at saas-metrics, so you can check it, run it yourself, or build on it. AI agents can call the same calculations through our MCP server.

Put these on your own site

Every calculator is embeddable with one line of code, free for commercial use with attribution. Grab a snippet from the embed gallery, or paste a calculator URL into WordPress, Ghost or Discourse and it will expand into the widget automatically.

What these tools can and cannot tell you

They compute from summary figures you supply, which makes them a fast first-pass screen. What they cannot see is anything that only emerges from customer-level data: cohort decay curves, renewal-cliff timing, or concentration in specific logos. That needs the full monthly MRR-by-customer ledger, which is what our paid analysis reads.

The scoring bands the tools apply are thresholds, not survey results. The sourced benchmark figures, with citations, are on the benchmarks page.

Before your next deal

The tools tell you what the data says. This tells you what to ask for.

The 23-point buyer-side churn audit checklist tells you what to request, in what order, and which answers are red flags — the list to work through before you sign an LOI.

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Got a target on your desk right now? The checklist is the manual route: two to four hours in a spreadsheet per target. Or send the subscription CSV once and get all five risks computed and human-reviewed for you — $9, one-time, no subscription, report in 2 business days.

Run one analysis — $9 →

Or read the sample report first and judge the analysis before you pay anything.