Who are these SaaS calculators for?

Founders and operators of subscription or usage-based products who want quick, in-browser estimates for MRR, fees, unit economics, and runway — not a substitute for accounting or legal advice.

Do these tools upload my financial data?

No server upload is required for the default flows; calculations run locally in your browser. Treat outputs as planning estimates only.

SaaS & founder tools

Calculators for subscription businesses: recurring revenue, unit economics, payment fees, and cash runway. We label them clearly as SaaS / B2B to avoid mix-ups with home-loan and mortgage searches. For anything legal, tax, or investment-related, work with a professional — these pages are for education and back-of-napkin planning.

Stripe & PayPal fee (take-home) Illustrative % + fixed fee, optional net tax line for rough planning
SaaS unit economics ARPA, margin, monthly churn, CAC → LTV and payback
MRR & ARR from CSV Paste a table; we sum an MRR column and annualize
Burn & runway Cash ÷ net monthly burn → months of runway

Also see: JSON-LD SaaS pack, Meta tag generator, and dev tools for product teams.