Free download

Founder Math: Eight Numbers Every Founder Should Know

A free cheat sheet for the eight numbers behind a small online business: contribution margin, break-even, conversion rate, average order value, CAC, LTV, payback period and churn. Each with a one-sentence definition, the formula, a worked example, the common mistake and one lever, all with the same example product, so the numbers connect. With a one-page sheet to print and a spreadsheet calculator.

The download starts right away; the link also comes by email.

Without the newsletter box you get exactly one email with your link; the address is deleted after 7 days.

What is inside
  • Margin What one sale leaves you: 29 € minus VAT and fee is 22.42 € in the example.
  • Break-even How many sales cover your fixed costs, and why you always round up.
  • Customers Conversion rate, average order value and CAC, with the mistakes that make them look better than they are.
  • Over time LTV, payback period and churn for one-time products and subscriptions.
  • Cheat sheet All eight numbers on one printable page: formula, example, watch out, lever.
  • Calculator A CSV for Numbers, Excel or Google Sheets: change price, VAT, fees and costs, and every number recalculates.

Nothing to install. A PDF viewer, and Numbers, Excel or Google Sheets for the calculator. No account. The guide is in English. Example figures only, not tax advice.

Fabian Faraz Farid · Imprint · Privacy