Free Online Converters
Convert millimeters to inches instantly with our free calculator, conversion formula, examples, and quick chart.
Enter a value in millimeters to convert it to inches.
Inches = Millimeters ÷ 25.4
Example: 50 mm ÷ 25.4 = 1.97 inches.
The mm to inches converter helps you change millimeters into inches quickly and accurately. Millimeters are a metric unit of length, while inches are commonly used in the imperial and US customary systems. This conversion is useful for engineering, product measurements, craft work, tools, and international size comparisons.
To convert millimeters to inches, divide the number of millimeters by 25.4. This works because one inch is exactly equal to 25.4 millimeters. For example, 10 mm equals 0.39 inches, 25 mm equals 0.98 inches, and 100 mm equals 3.94 inches.
This page gives you a quick calculator, a simple formula, and a chart of common conversions. Instead of calculating manually, you can use the converter above to get your answer instantly.
| Millimeters | Inches |
|---|---|
| 1 mm | 0.0394 in |
| 2 mm | 0.0787 in |
| 5 mm | 0.1969 in |
| 10 mm | 0.3937 in |
| 15 mm | 0.5906 in |
| 20 mm | 0.7874 in |
| 25 mm | 0.9843 in |
| 30 mm | 1.1811 in |
| 40 mm | 1.5748 in |
| 50 mm | 1.9685 in |
| 75 mm | 2.9528 in |
| 100 mm | 3.9370 in |
| 150 mm | 5.9055 in |
| 200 mm | 7.8740 in |
1 mm equals 0.0394 inches.
Divide the number of millimeters by 25.4.
100 mm equals 3.937 inches.
It is useful for tools, product sizes, technical drawings, craft projects, and comparing metric and imperial measurements.