Convert between metric and imperial length units, including millimeters (mm), meters (m), inches (in), feet (ft), and miles (mi). Length is a fundamental physical quantity measuring the distance between two points. The meter (m) is the SI base unit; imperial units are defined by exact conversion factors to SI (e.g. 1 in = 25.4 mm).
This length converter transforms values from Millimeters (mm) to Inches (in). Results update instantly using the exact conversion factor.
The millimeter (mm) is one-thousandth of a meter (1 mm = 10⁻³ m).
The inch (in) is an imperial length unit equal to exactly 25.4 mm (1 in = 0.0254 m).
1 mm ÷ 25.4 = 0.03937 in
in = mm ÷ 25.4
To convert mm to in, divide the value in mm by 25.4 (since 1 mm = 0.03937 in). Equivalently, multiply by 0.03937. Example: 1 mm = 1 mm × 0.03937 = 0.03937 in.
10 mm = 0.393701 in ÷ 25.4 = 10 mm
Common values from mm to in.
| mm | in |
|---|---|
| 1 | 0.0394 |
| 2 | 0.0787 |
| 3 | 0.1181 |
| 4 | 0.1575 |
| 5 | 0.1969 |
| 6 | 0.2362 |
| 7 | 0.2756 |
| 8 | 0.315 |
| 9 | 0.3543 |
| 10 | 0.3937 |
| 11 | 0.4331 |
| 12 | 0.4724 |
| 13 | 0.5118 |
| 14 | 0.5512 |
| 15 | 0.5906 |
| 16 | 0.6299 |
| 17 | 0.6693 |
| 18 | 0.7087 |
| 19 | 0.748 |
| 20 | 0.7874 |