Convert millimeters to inches and inches to millimeters instantly. Precision converter for engineering and manufacturing.
Multiply the millimeter value by 0.0393701, or divide by 25.4. Since one inch is defined as exactly 25.4 mm, this conversion is exact and commonly used in precision engineering, CNC machining, and hardware specifications.
| Millimeters | Inches |
|---|---|
| 3 | 0.1181 |
| 6.35 | 0.2500 |
| 12.7 | 0.5000 |
| 25.4 | 1.0000 |
| 50 | 1.9685 |
| 127 | 5.0000 |
| 254 | 10.0000 |
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One millimeter equals approximately 0.0393701 inches.
Multiply the millimeter value by 0.0393701. For precision work, 0.1 mm equals about 0.00394 inches (roughly 4 thousandths of an inch).
Exactly 1 inch. The inch is defined as precisely 25.4 millimeters, so dividing any mm value by 25.4 gives the exact inch equivalent.
Millimeters are standard in engineering, medicine, and science worldwide. Inches are common in US construction, manufacturing, and hardware sizing.