To convert inches to millimeters, use mm = in × 25.4. This Inches to Millimeters page gives a calculator, formula, table, and worked example for in to mm. It also explains the inch to millimeter relationship so you can convert inches to millimeters quickly and check the result.
Use this page to convert inches to millimeters, compare in to mm, and check the inch to millimeter conversion with a formula, examples, and a reference table.
Example: convert 1 inches to millimeters
Formula: mm = in × 25.4
Calculation: 1 × 25.4 = 25.4 -> 1 inches = 25.4 millimeters
Result: 1 inches = 25.4 millimeters
| Inches (in) | Millimeters (mm) |
|---|---|
| 0.01 in | 0.254 mm |
| 0.1 in | 2.54 mm |
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 5 in | 127 mm |
| 10 in | 254 mm |
| 12 in | 304.8 mm |
| 50 in | 1,270 mm |
| 100 in | 2,540 mm |
| 1000 in | 25,400 mm |
The symbol for inch is in.
An inch is an imperial and US customary length unit defined as exactly 25.4 millimeters.
It is commonly used for screens, hardware, product dimensions, clothing measurements, and small everyday lengths in the United States.
1 inch equals 2.54 centimeters, 25.4 millimeters, or 1/12 of a foot.
The symbol for millimeter is mm.
A millimeter is a metric length unit equal to one thousandth of a meter.
It is used for precise small measurements in engineering, manufacturing, drawings, hardware, and product specifications.
1 millimeter equals 0.001 meters, 0.1 centimeters, or about 0.0393701 inches.
To convert inches to millimeters, use mm = in × 25.4. This is the main in to mm formula used by the calculator and table.
1 in equals 25.4 mm.
1 mm equals 0.0393700787 in.
in to mm is the abbreviated form of inch to millimeter. It uses in for inch and mm for millimeter.
Result: 1 Inch = 25.4 Millimeter
The calculator converts 1 Inch to Millimeter and formats the result as 25.4 Millimeter.
Formula
1 in = 25.4 mm