UnitConConvert Millimeters to Inches
Convert millimeters to inches for fastener sizing, fabrication, consumer products, and technical drawings. This page is especially useful for small-size comparisons.
Formula
Divide millimeters by 25.4 to get inches. To reverse, multiply inches by 25.4 to get millimeters.
Quick reference
| Millimeter (mm) | Inch (in) |
|---|---|
| 1 | 0.03937008 |
| 2 | 0.07874016 |
| 3 | 0.1181102 |
| 5 | 0.1968504 |
| 6 | 0.2362205 |
| 10 | 0.3937008 |
| 12 | 0.4724409 |
| 15 | 0.5905512 |
| 20 | 0.7874016 |
| 25 | 0.984252 |