Campaign Margin — a calculator for buying the next click

Field notes

The calculator separates click economics from downstream conversion assumptions, then subtracts both ad spend and allocated campaign costs from customer contribution. Its scenario view changes only the click-to-lead rate, while the explanatory notes caution that fractional customers are averages and that lifetime contribution can overstate near-term cash. Results can be downloaded, shared through a URL fragment, or embedded, and the page says inputs are not stored in its event database.