Convert mm to inches
Enter the number of millimeters that you want to convert to inches.
How to Convert Millimeters to Inches
The millimeter and inch are both units of length. By definition, 1 inch equals exactly 25.4 millimeters. This means to convert millimeters to inches, you divide by 25.4.
Formula
Step-by-Step Example
Convert 5 mm to inches:
We need to convert millimeters to inches
Since 1 in = 25.4 mm, divide by 25.4
5 ÷ 25.4 = 0.1968503937
5 mm = 0.1968503937 in
Millimeter to Inch Conversion Table
Quick reference table for common millimeter to inch conversions. Click any value for detailed calculation.
| Millimeters (mm) | Inches (in) |
|---|---|
| 1 mm | 0.0393700787 in |
| 2 mm | 0.0787401575 in |
| 5 mm | 0.1968503937 in |
| 10 mm | 0.3937007874 in |
| 15 mm | 0.5905511811 in |
| 20 mm | 0.7874015748 in |
| 25 mm | 0.9842519685 in |
| 50 mm | 1.968503937 in |
| 100 mm | 3.937007874 in |
About These Units
Millimeter (mm)
A millimeter (mm) is a metric unit of length equal to 1/1000 of a meter or 0.03937 inches. Millimeters are essential for precision measurements in engineering, manufacturing, medical imaging, and rainfall measurements. There are 25.4 mm in one inch.
Inch (in)
An inch (in or ") is an imperial unit equal to 1/12 foot or exactly 2.54 centimeters. Inches measure screen sizes (TVs, monitors, phones), paper dimensions, rainfall, and small objects in the US, UK, and Canada. There are 25.4 millimeters in one inch.
Frequently Asked Questions
How do I convert millimeters to inches?
To convert millimeters to inches, divide the value by 25.4. For example, 10 mm = 0.3937007874 in.
How many inches are in 1 millimeter?
1 millimeter equals 0.0393700787 inches.
What is the formula for millimeters to inches?
The formula is: in = mm ÷ 25.4.