Convert millimeters to inches instantly.
Press Enter to save conversion history.
1 mm = 0.0393701 inches
One millimeter equals approximately 0.0393701 inches.
Multiply millimeters by the stored factor 0.03937007874015748. For 100 mm, the result is approximately 3.937 inches.
mm: a metric unit equal to one-thousandth of a meter.
Inches: an imperial and US customary length unit defined as exactly 25.4 millimeters.
The calculation uses the exact reciprocal of 25.4. Display results may be rounded to fewer decimal places.
| mm | Inches |
|---|---|
| 1 | 0.0394 |
| 10 | 0.3937 |
| 100 | 3.937 |
| 1000 | 39.37 |
One millimeter is approximately 0.0393701 inches.
Divide millimeters by 25.4, or multiply by approximately 0.0393701.
A millimeter is much smaller than an inch, so most millimeter values convert to fractional inches.
Use our full converter for all units: Try the Multi Unit Converter