Instantly convert millimeters (mm) to inches (in). Bidirectional, accurate, and free.
To convert millimeters to inches, use the formula inches = millimeters × 0.0394. For example, 2 millimeters equals 0.0787 inches. Type any number into the calculator above and the result appears instantly — you can also type into the inches box to convert the other way.
| Millimeters | Inches |
|---|---|
| 1 mm | 0.0394 in |
| 2 mm | 0.0787 in |
| 3 mm | 0.1181 in |
| 5 mm | 0.1969 in |
| 10 mm | 0.3937 in |
| 20 mm | 0.7874 in |
| 50 mm | 1.9685 in |
| 100 mm | 3.937 in |
There are 0.0394 inches in one millimeter. To convert any value, apply the formula inches = millimeters × 0.0394.
The formula is inches = millimeters × 0.0394. Enter a value above and the result updates instantly in both directions.
Yes. It uses the exact internationally-defined conversion factor, so results match official standards to several decimal places.
Yes — the converter is bidirectional. Type in either box and the other updates automatically using the inverse formula.