Convert Millimeter to Inch
1 millimeter equals 0.039370079 inches. Enter a value below to convert instantly.
Formula
Multiply the number of millimeters by 0.0393700787402 to get inches.
Step by step
- Start with 1 mm.
- Multiply by the conversion factor 0.0393700787402.
- 1 × 0.0393700787402 = 0.039370079 in.
Millimeter to Inch conversion table
| Millimeters (mm) | Inches (in) |
|---|---|
| 1 | 0.039370079 |
| 2 | 0.078740157 |
| 3 | 0.11811024 |
| 5 | 0.19685039 |
| 10 | 0.39370079 |
| 20 | 0.78740157 |
| 50 | 1.9685039 |
| 100 | 3.9370079 |
| 500 | 19.685039 |
| 1,000 | 39.370079 |
About the millimeter
The millimeter (mm) is a SI unit of length.
About the inch
The inch (in) is a Imperial unit of length.
Where this conversion is used
Converting millimeters to inches comes up when measuring height, screen sizes, travel distances, fabric, and construction dimensions. Metric and Imperial length units are both in daily use, so quick conversion is often needed when following instructions from another country.
Need the other direction? Convert inch to millimeter →
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Frequently asked questions
How many inches are in a millimeter?
One millimeter equals 0.039370079 inches.
How do you convert millimeters to inches?
Multiply the number of millimeters by 0.0393700787402 to get inches.
What is 1 inch in millimeters?
One inch equals 25.4 millimeters.
When would I convert millimeters to inches?
This conversion is common when measuring height, screen sizes, travel distances, fabric, and construction dimensions.
Conversion factors are based on internationally agreed unit definitions. See our methodology and sources for details on how these values are verified.