Calculators run locally
Calculator inputs and calculations are handled in your browser. The dimensions, options and numbers you enter are not submitted to our server for calculation. Using the calculators does not require an account, name or email address.
Saved inputs
The calculators save the inputs you enter in your browser’s local storage, on your own device, so you can leave and pick up where you left off. Saved inputs are stored only on your device — they are not sent to our servers. You can clear them at any time through your browser settings.
Anonymous usage events
We count anonymous usage events — calculator started, calculator completed and result viewed — to understand whether the tools are usable. These events carry only categorical parameters: which tool, the data package version, the selected scope, finish tier, whether a layout change was selected, and the selected state.
We never collect the amounts, sizes or other numbers you enter. The calculators have no accounts, so events contain no name, email address or account identifier.
Advertising
The calculator pages do not currently serve advertising and do not set advertising cookies. If advertising is introduced in the future, this policy will be updated before it starts.
Your choices
You can clear cookies and site data — including locally saved calculator inputs — in your browser, and block optional analytics. Blocking optional analytics does not change the calculator’s local arithmetic.
We do not sell personal information. The calculators do not ask for contact details or send your project inputs to contractor lead services.
Policy changes
Changes to this policy will be published on this page with an updated date. The date changes when the policy content changes, not for styling changes or routine rebuilds.
Updated