Inches to Millimeters Converter
One inch equals exactly 25.4 millimeters. This precision conversion is widely used in engineering, machining, and carpentry.
Formula
mm = in × 25.4Convert Inches (in) to Millimeters (mm).Example: 0.25 in = 6.35 mm
Common Values
| Inch | Millimeter |
|---|---|
| 0.25 in | 6.35 mm |
| 0.5 in | 12.7 mm |
| 1 in | 25.4 mm |
| 1.5 in | 38.1 mm |
| 2 in | 50.8 mm |
| 3 in | 76.2 mm |
| 4 in | 101.6 mm |
| 5 in | 127 mm |
| 6 in | 152.4 mm |
| 8 in | 203.2 mm |
| 10 in | 254 mm |
| 12 in | 304.8 mm |
Unit Definitions
Inch
Symbol: in
The Inch (in) is a unit of length.
Millimeter
Symbol: mm
The Millimeter (mm) is a unit of length.
Looking for the reverse? Millimeter to Inch converter →