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Create a QR code for a link, Wi-Fi, WhatsApp, contact and more, or read one from a photo.
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Fill in the details to see your QR code.
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Inches to MM
Convert inches to millimetres instantly. 1 in = 25.4 mm.
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- Works on any device
About Inches to MM
One inch is exactly 25.4 millimetres, so multiply inches by 25.4. Engineers, machinists and DIYers use it for bolts, pipes, drill bits and sheet thickness. Fractions work too: 1/4 inch is 6.35 mm and 3/8 inch is 9.525 mm.
How to use Inches to MM
- Type the value you want to convert.
- Choose the units to convert from and to.
- See the answer instantly, with a table of every unit and the formula.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Available in 10 languages.
Also known as
Frequently asked questions
What is 1/2 inch in mm?
Exactly 12.7 mm, since 0.5 x 25.4 = 12.7.
Is Inches to MM free?
Yes. Inches to MM on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.