Convert Inches to Millimeters
Use our free online converter to easily convert from Inches to Millimeters. Get accurate conversions instantly.
Converting Inches to Millimeters
Converting inches to millimeters is crucial in precision engineering, manufacturing, and international trade, particularly when translating between imperial and metric specifications.
Mathematical Relationship
The mathematical relation between inches and millimeters is: 1 inch = 25.4 millimeters. To convert a length in inches to millimeters, multiply the inch value by 25.4.
Common Conversion Values
| Inches | Millimeters |
|---|---|
| 0.1 | 2.54 |
| 0.5 | 12.7 |
| 1 | 25.4 |
| 10 | 254 |
| 100 | 2540 |
Unit Definitions
Inches
The inch (symbol: in) is a unit of length in the imperial and US customary systems of measurement. It is equal to 1/12 of a foot or 1/36 of a yard.
Millimeters
The millimeter (symbol: mm) is a unit of length in the metric system, equal to one-thousandth of a meter. It is commonly used for precise measurements of small objects.
Historical Context
The inch has historical roots in various ancient measurements based on the width of a human thumb. The millimeter was established as part of the metric system during the French Revolution. The precise relationship between them was established when the inch was defined as exactly 25.4 mm in 1959.