How to Convert Inches to Millimeters
To convert from Inches (in) to Millimeters (mm), apply the following formula:
mm = inches × 25.4
Example: 1 in = 25.4 mm
Quick Reference Table
Common inches to millimeters conversions:
| Inches (in) | Millimeters (mm) |
|---|---|
| 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 |
| 250 in | 6350 mm |
| 500 in | 12700 mm |
| 1000 in | 25400 mm |
Use our converter above for precise values at any input.
About Inches and Millimeters
Inches (in) and Millimeters (mm) are both length units used in different measurement systems around the world. Our free converter lets you convert any value between them instantly without needing to remember the conversion factor.