Free calculators for founders

Price a product, check your runway, set a freelance rate. Free, no sign‑up, and nothing leaves your browser.

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Payments

Stripe, PayPal, Shopify fees and payout math

SaaS Growth Metrics

MRR, ARR, growth rate, pricing and burn efficiency

SaaS Retention Metrics

CAC, LTV, churn, retention and customer health

Freelance

Rates, estimates and taxes for independent work

Pricing & Margins

Margins, break-even, pricing and core arithmetic

Marketing

ROAS, conversion, funnels, quota and campaign ROI

Finance

Cash flow, ratios and core financial statements

Cash Flow

Runway, working capital and how fast cash actually arrives

Investment & Returns

NPV, IRR, payback and whether a spend earns its keep

Valuation

DCF, multiples, enterprise value and fundraising math

Tax & Compliance

Payroll tax, self-employment tax and filings

HR & People

Headcount cost, turnover and compensation

Recently added

Churn Revenue Loss New

Forecast monthly and annual revenue lost to churn — and the MRR needed to break even.

ARR Growth Rate New

Calculate your Annual Recurring Revenue growth rate, T2D3 trajectory, and years to reach your ARR target.

SaaS Pricing New

Calculate optimal SaaS pricing tiers based on your costs, target margin, and willingness-to-pay — with monthly and annual plan analysis.

Why FounderCalc?

Generic utility tools compete against 10-year-old domains with millions of backlinks. FounderCalc focuses exclusively on the calculations that indie founders, bootstrapped SaaS builders, and freelancers actually need: the ones that involve real business math with real stakes.

Every calculator runs 100% in your browser. Nothing you type is ever sent to a server. No accounts. No tracking. No cookies beyond what your browser sets automatically. If you need a calculator that isn't here yet, let us know.