Yes, completely free with no signup required.

Does my data leave my device?

No. Everything runs in your browser — nothing is sent to a server.

Does it work on mobile?

Yes. The tool is mobile-first and works on any modern browser.

A4・Letter・Legal・A3など50以上の標準用紙サイズをmm・cm・インチで検索。

100% client-side · no upload

Name	mm (W × H)	cm (W × H)	in (W × H)

Browse the table or type a size name in the search box (e.g. "A4" or "Letter").
Each row shows width × height in millimetres, centimetres, and inches.
Use the dimensions to configure your printer, design software, or document settings.

Is this tool free?: Yes, completely free with no signup required.
Does my data leave my device?: No. Everything runs in your browser — nothing is sent to a server.
Does it work on mobile?: Yes. The tool is mobile-first and works on any modern browser.

Last updated: 2026-05-20 By jarvisbox