1 in = 25.4 mm
Inches (in)
Millimeters (mm)
Result
—mm
| Inches | Millimeters |
|---|---|
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 5 in | 127 mm |
| 10 in | 254 mm |
| 25 in | 635 mm |
| 50 in | 1270 mm |
| 100 in | 2540 mm |
| 500 in | 12700 mm |
| 1000 in | 25400 mm |
How to Convert Inches to Millimeters
1 in = 25.4 mm
To convert from inches to millimeters, use the formula above. Multiply your value in inches by the conversion factor to get the result in millimeters.
About Inches
The inche (in) is a standard unit of length measurement used in scientific and everyday contexts worldwide.
About Millimeters
The millimeter (mm) is widely used in science and international contexts.
Frequently Asked Questions
QHow many millimeters in 1 inche?
1 inche equals 25.4 millimeters.
QHow do I convert inches to millimeters?
Use the formula: 1 in = 25.4 mm. Or simply enter your value in the converter above for an instant, accurate result.
QIs this converter accurate?
Yes. CVRT uses precise conversion factors based on international standards (SI units). Results are accurate to 8 significant figures.
QCan I convert millimeters back to inches?
Yes — click the swap button (⇄) or visit the Millimeters to Inches converter page.