Privacy

The calculators on this site run entirely in your browser. Your measurements, part lists and prices are never sent anywhere — there is no server to send them to, no account, and no database. Sharing a calculation does not change that: there is nothing to log in to, and nothing leaves your device unless you send somebody a link yourself.

What is stored on your device

Three things, all in your browser's local storage. The cut list optimizer remembers which cuts you have ticked off, so a job survives the screen locking. Any job you save under a name is kept the same way — the measurements you typed, the name you gave it and the date, nothing else. And when you send a cut list from one calculator to another, the drawer box calculator to the cut list optimizer, the parts themselves are written there so the second page can pick them up; that parcel holds the dimensions and labels of the parts, which are measurements you typed.

All three stay on your device, are readable only by this site, and are cleared whenever you clear your browser data. None of it is ever sent anywhere — there is no server to send it to — and nothing in it identifies you. Saving does not create an account: there is still nothing to log in to. Because they live in one browser, saved jobs do not follow you to another device — a share link is how you move one — and clearing site data removes them, so a save is not a backup. You can export or delete the lot from your saved jobs, and the optimizer's "Dismiss" button clears a waiting parcel straight away.

Sharing a calculation

Every calculator has a "Copy link to this layout" button. The measurements travel inside the link — a stair is eight numbers, and those eight numbers are written into the address itself. The link is assembled in your browser: nothing is uploaded, and this site never sees it or knows it exists.

The flip side is worth saying plainly. Anyone you send the link to can read those numbers, and so can whatever you paste it into — a messaging app, an email, a job-site group chat may all keep their own copy. A link is a way to hand somebody a layout, not a way to keep one private.

Analytics

We count page views with Vercel Analytics so we know which calculators are worth building more of. It sets no cookie and stores no identifier on your device, so it cannot follow you between sites or recognise you on a return visit.

Fonts and hosting

The typeface is served from this site rather than a third-party font CDN, so loading a page does not tell anyone else that you visited. Hosting is Vercel, which keeps standard server request logs.

Getting in touch

Questions go to carpentrycalculators@googlegroups.com.