Inch to Millimeter Converter
1 in = 0.03937 mm · exact factor
Quick conversions
Common conversions
| in | mm |
|---|---|
| 1 in | 25.4000 mm |
| 5 in | 127.0000 mm |
| 10 in | 254.0000 mm |
| 20 in | 508.0000 mm |
| 50 in | 1270.0000 mm |
| 100 in | 2540.0000 mm |
About this conversion
The inch (in) is a unit of length in the imperial / US customary, commonly used for TV and monitor screen diagonals and US and UK clothing sizes. The millimeter (mm) belongs to the metric (SI) and is typically found in measurements related to engineering and manufacturing tolerances and bolt and screw dimensions. By definition, one inch is exactly 2.54 centimeters, by international agreement since 1959. One millimeter is one thousandth of a meter (0.001 m). The conversion factor between these two units is 25.4: multiplying any value in in by this number gives the equivalent in mm. For example, 10 in equals 254.0000 mm. Going the other direction, 1 mm equals 0.03937 in. The inch was historically based on the width of a human thumb. Its exact metric equivalent (2.54 cm) was standardized internationally in 1959.
Examples
- →55 in to mm = 1397.0000 mm
- →55 in in mm is 1397.0000 mm
- →55 in equals 1397.0000 mm
- →Convert 55 in to mm: 1397.0000 mm
- →How much is 55 in in mm? 1397.0000 mm
- →What is 55 in in mm? 1397.0000 mm
- →55 in converted to mm is 1397.0000 mm
- →1397.0000 mm is equal to 55 in