Inches to millimeters table
| inches (in) | millimeters (mm) |
|---|---|
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 3 in | 76.2 mm |
| 4 in | 101.6 mm |
| 5 in | 127 mm |
| 10 in | 254 mm |
| 20 in | 508 mm |
| 25 in | 635 mm |
| 50 in | 1,270 mm |
| 75 in | 1,905 mm |
| 100 in | 2,540 mm |
1 in in other units
| meters (m) | 0.0254 |
|---|---|
| centimeters (cm) | 2.54 |
| millimeters (mm) | 25.4 |
| kilometers (km) | 0.0000254 |
| feet (ft) | 0.0833333 |
| yards (yd) | 0.0277778 |
| miles (mi) | 0.0000157828 |
| nautical miles | 0.0000137149 |
| micrometers (µm) | 25400 |
How the value is converted
1 in × 25.4 = 25.4 mm
Feet and inches use the international definition (1 ft = 0.3048 m).
The first answer is rounded to two decimal places for results of 1 or more, or three significant digits below 1; the exact figure keeps 10 significant digits. Why rounding early changes the answer.