About Calcmill

Calcmill is a free set of calculators for SaaS founders and freelancers: unit economics, growth, runway, pricing, and the money math of independent work. Each one shows its formula, uses real benchmarks, and comes with sensible defaults already filled in.

Why it exists

Most business calculators online are lead-gen bait — the answer sits behind an email form, a “book a demo” button, or a PDF you will never read. Calcmill exists to be the opposite: type numbers, get answers, see the math. No signup, no paywall, no funnel.

Private by construction

Every calculation runs entirely in your browser. The numbers you type are never transmitted to us or stored anywhere — there is no backend to send them to. Read more in the privacy policy.

Who builds it

Calcmill is built and maintained by an independent developer. The models are deliberately simple and transparent — estimates for directional decisions, not financial or tax advice. Spotted an error or want another calculator? Get in touch.