Convert inches to millimeters instantly. You can also swap units.
millimeters = inches ร 25.4
1 inch = 25.4 millimeters
An inch (in) is an imperial unit of length commonly used in the United States, United Kingdom, and Canada. It is widely used for screen sizes, tools, hardware, and everyday measurements.
A millimeter (mm) is a metric unit of length equal to one thousandth of a meter. It is commonly used in engineering, manufacturing, medicine, and precision measurements.
Example: 4 in ร 25.4 = 101.6 mm
| Inches (in) | Millimeters (mm) |
|---|---|
| 1 | 25.4 |
| 2 | 50.8 |
| 3 | 76.2 |
| 4 | 101.6 |
| 5 | 127 |
| 6 | 152.4 |
| 8 | 203.2 |
| 10 | 254 |
| 12 | 304.8 |
| 20 | 508 |
2 inches = 50.8 millimeters
5 inches = 127 millimeters
12 inches = 304.8 millimeters
There are exactly 25.4 millimeters in one inch.
Because one inch is internationally defined as exactly 25.4 millimeters.
Yes. The inch-to-millimeter conversion factor is exact.
Inches are larger units than millimeters. One inch is equal to 25.4 millimeters, meaning it contains many smaller metric units.