Convert Millimeters to Inches
Use our free online converter to easily convert from Millimeters to Inches. Get accurate conversions instantly.
Converting Millimeters to Inches
Converting millimeters to inches is essential in international manufacturing, engineering, and product design, particularly when working between metric and imperial measurement systems.
Mathematical Relationship
The mathematical relation between millimeters and inches is: 1 inch = 25.4 millimeters. To convert a length in millimeters to inches, divide the millimeter value by 25.4.
Common Conversion Values
| Millimeters | Inches |
|---|---|
| 1 | 0.03937 |
| 10 | 0.3937 |
| 25.4 | 1 |
| 100 | 3.937 |
| 1000 | 39.37 |
Unit Definitions
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.
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.
Historical Context
The millimeter was established as part of the metric system during the French Revolution. The inch has historical roots in various ancient measurements based on the width of a human thumb. The precise relationship between them was established when the inch was defined as exactly 25.4 mm in 1959.