FAQ

Yes. Every calculator, chart, and converter on 7TShirts is completely free, with no sign-up and no usage limits.

No. Every calculation runs locally in your browser. Your measurements are never sent to or stored on our servers. See our Privacy Policy for details.

Yes — the site is fully responsive, and most browsers (like Chrome) will offer their own "Install" or "Add to Home Screen" option — usually as an icon in the address bar or your browser menu.

Yes — every calculator has its own shareable link, for example 7tshirts.com/#bra opens straight to the Bra Size Calculator.

Each brand uses its own block pattern and fit philosophy, so a Medium in one brand can fit differently from a Medium in another, even at the same chest measurement. Read our guide on why brands size differently.

It uses a standard band-and-cup measurement method — a reliable starting point, but fit still varies by brand and style, so trying before buying is always recommended.

It gives a rough planning estimate based on typical garment yardage. Actual fabric needed depends on the pattern, print matching, and your tailor's specific cutting method — always confirm with your tailor before buying fabric.

A Calculator takes your own body measurement and gives you a size. A Size Chart is a static reference table you read directly, no typing needed. The Converter is for when you already know your size in one country and want it in another, without measuring anything.

No. Every tool on 7TShirts works immediately, with no account or login required.

Yes — every calculator result has Copy, Print, and Share buttons so you can save your size, print a clean copy, or send it to a friend.

Yes — use the circular toggle in the top-right corner of the header. Your preference is remembered for future visits.

Once you've visited the site, core pages are cached for faster loading and basic offline access, thanks to a service worker.

Please contact us with the calculator name and the inputs you used, and we'll look into it as quickly as possible.