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Millimeters to Inches Conversion Information
Converting millimeters (mm) to inches (in) is a common length conversion when working between metric and imperial measurement systems. Millimeters are widely used in engineering, manufacturing, and scientific fields, while inches are commonly used in the United States and other countries that use imperial measurements.
How to Convert Millimeters to Inches
To convert millimeters to inches, use the following formula:
in = mm / 25.4
Millimeters to Inches Conversion Table
| Millimeters (mm) | Inches (in) | Common Reference |
|---|---|---|
| 1 mm | 0.0394 in | Thickness of a credit card |
| 5 mm | 0.1969 in | Diameter of a pencil eraser |
| 10 mm | 0.3937 in | Width of a standard paper clip |
| 25.4 mm | 1 in | Standard ruler increment |
| 50 mm | 1.9685 in | Width of a golf ball |
| 100 mm | 3.9370 in | Diameter of a CD/DVD |
| 150 mm | 5.9055 in | Length of a smartphone |
| 300 mm | 11.8110 in | Standard ruler length |
Common Millimeter to Inch Conversions
- 1 mm = 0.03937 in
- 10 mm = 0.3937 in
- 25.4 mm = 1 in (exact conversion)
- 100 mm = 3.937 in
About Millimeters
The millimeter (mm) is a unit of length in the metric system, equal to one-thousandth of a meter. It is commonly used for small measurements in engineering, manufacturing, and science. Millimeters provide high precision for measurements requiring accuracy.
About Inches
The inch (in) is a unit of length in the imperial and US customary systems. It is defined as exactly 25.4 millimeters. The inch is widely used in the United States for everyday measurements and in construction, as well as in fields like electronics for screen sizes.
In precision engineering and machining, measurements are often given in both millimeters and inches to accommodate different standards and tools.