Material projects.
Free project planning, saving and exports. Combine calculations, track purchases and join the cloud account waitlist.
Projects are stored only in this browser. Clearing site data can delete them. Download a JSON backup for safekeeping.
Use calculators without a connection
Download a self-contained HTML edition while connected. Open the downloaded file in a modern browser to calculate without internet access. It contains the existing calculation engines and no personal projects or account credentials.
Download offline calculator editionKeep your browser backup separately. Offline you can recalculate purchase projects, update purchased amounts and prices, then download the changed project JSON. Changes are not saved automatically. Restore full profiles, history and drafts in the main app. Download an updated edition after formula changes. This does not cache private website pages or change sharing settings.
Back up or restore this browser
Keep a copy before clearing browser data or moving devices. This file contains personal project details; store it somewhere you trust. It excludes cloud projects, account credentials and unsaved changes.
Cloud accounts — join the waitlist
All calculators, browser projects and exports remain free. Cloud accounts are planned at USD $9/month for cross-device access, cloud backups and future collaboration. Features and launch timing are not final. No charge today; joining does not create an account or subscription.
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