inches = millimeters ÷ 25.4
millimeters = inches × 25.4
| Millimeters | Inches |
|---|---|
| 1 mm | 0.039370 in |
| 5 mm | 0.196850 in |
| 10 mm | 0.393701 in |
| 15 mm | 0.590551 in |
| 20 mm | 0.787402 in |
| 25 mm | 0.984252 in |
| 25.4 mm | 1.000000 in |
| 50 mm | 1.968504 in |
| 100 mm | 3.937008 in |
| 254 mm | 10.000000 in |
Millimeters and inches are both units of length measurement from different systems. Millimeters are part of the metric system, used worldwide for precise measurements. Inches are part of the imperial system, primarily used in the United States, United Kingdom, and a few other countries.
The relationship between millimeters and inches is precisely defined: 1 inch equals exactly 25.4 millimeters. This exact conversion factor ensures consistency in technical applications where precision is critical.