Method & worked examples · Updated 1 November 2026
Privacy and local calculations
The free calculator runs its calculations in your browser. Its code does not send your entered crew, hour, cost or margin figures to us.
Calculator inputs
The public free edition does not save input values in browser storage, put them in page links, or collect an email address. Refreshing the page restores the fictional worked example. There is no account, checkout or file-upload form on this site.
Network and hosting
The page has no analytics scripts, advertising pixels, remote fonts or external calculation service. Loading this website still connects your browser to Cloudflare Pages. The hosting service may process ordinary connection data such as IP address, requested URL, user agent and request time under its policies. “Calculations stay local” does not mean a web request is anonymous or unlogged.
See Cloudflare’s privacy policy for its handling of personal data. We have not implemented visitor-level advertising profiles, email lists or a count of calculator trials.
Search discovery
We may submit the public addresses of our pages to participating search engines through IndexNow. Those submissions contain public site URLs and an ownership-verification key, not your calculator entries.
Before any paid release
The separate offline edition is not sold here. Any future checkout, merchant support contact, purchase terms and payment-provider data processing must be disclosed before that release. Do not enter customer names, addresses or sensitive business details into the free calculator.
All money examples are in USD. Calculations use your inputs and exclude automatic sales tax, income tax and percentage payment fees. No result is a promise of profit.