Inches to mm Converter
Convert length from inches to millimeters instantly. Useful for hardware, engineering, crafts, and measurement comparison.
Enter a non-negative value. 1 inch equals exactly 25.4 mm.
Result will appear here.
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Privacy: runs locally in your browser. No inputs are stored or transmitted.
How it works
Uses the standard conversion: 1 inch = 25.4 mm.
Formula: mm = in × 25.4
Examples
- 1 in = 25.4 mm
- 2 in = 50.8 mm
- 10 in = 254 mm
FAQ
- How do you convert inches to millimeters?
Multiply inches by 25.4 to get millimeters.
- Can I reverse the conversion?
Yes. Use the Reverse button to switch between inches to millimeters and millimeters to inches.
- What is this useful for?
It is useful for hardware sizes, manufacturing, crafts, screens, and everyday measurement conversion.
- Are my inputs stored?
No. All calculations run locally in your browser.