Inches (in) and millimeters (mm) are units of length used in different measurement systems:
| Inches | Millimeters |
|---|---|
| 1/8 | 3.175 |
| 1/4 | 6.35 |
| 1/2 | 12.7 |
| 1 | 25.4 |
| 2 | 50.8 |
To convert inches to millimeters, multiply the inch value by 25.4
To convert millimeters to inches, divide the millimeter value by 25.4