Foot Your measurements
Calculator values are processed in your browser. We do not send them to a database or store them on our server. Values are encoded in the URL fragment (the part after #), which is not included in normal HTTP page requests. They may remain in browser history or synced history. Anyone who receives the complete link can read its contents.
Local preferences
Only the text-size preference is stored in localStorage (fa-text). The Quick/Detailed view lives in the calculation URL. Clearing site data removes local preferences. We set no cookies and include no analytics, advertising scripts or tracking pixels.
Optional map
The map library is served with this site. Map tiles load from OpenStreetMap only after you choose to load the map. Tile requests reveal your IP address, browser information and the viewed map region to that service, but we do not send it your polygon as a separate data submission. See the OpenStreetMap Foundation privacy policy.
Hosting and contact
The hosting provider may process ordinary request and security logs, including IP addresses. Email sent to us is handled by the email service and may be retained to address your request. Do not send sensitive information unnecessarily.